Login from Nextcloud iOS app fails with error encoding device with utf8

By use the iOS App I get the following entries in the syslog.
My devicename ist IPhone Jö… → at the Error its not possible to convert the characters tu UTF-8. Database ist psotgreSQL.

Environment:
IOS 15.1
Nextcloud: 211119415
System from syncloud.git Ondroid XU4

Dec 5 16:31:42 syncloud snapd[362]: 2021/12/05 16:31:42.134555 store.go:749: search query:
Dec 5 16:31:42 syncloud nextcloud.postgres[27444]: [4-1] 2021-12-05 16:31:42.709 GMT [27444] ERROR: invalid byte sequence for encoding “UTF8”: 0xf6 0x72 0x67 0x20
Dec 5 16:31:42 syncloud nextcloud.postgres[27444]: [4-2] 2021-12-05 16:31:42.709 GMT [27444] STATEMENT: INSERT INTO “oc_authtoken” (“uid”, “login_name”, “public_key”, “private_key”, “password”, “name”, “token”, “type”, “remember”, “last_activity”, “last_check”, “version”) VALUES($1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12)
Dec 5 16:31:42 syncloud Nextcloud[26304]: {“reqId”:“IjbaYIcpGZ6eMNTFmk5a”,“level”:3,“time”:“2021-12-05T16:31:42+00:00”,“remoteAddr”:“192.168.220.88”,“user”:“joerg.hirsch”,“app”:“index”,“method”:“POST”,“url”:"/login",“message”:"{“Exception”:“OC\\DB\\Exceptions\\DbalException”,“Message”:“An exception occurred while executing a query: SQLSTATE[22021]: Character not in repertoire: 7 ERROR: invalid byte sequence for encoding \“UTF8\”: 0xf6 0x72 0x67 0x20”,“Code”:7,“Trace”:[{“file”:"/snap/nextcloud/211119415/nextcloud/lib/private/DB/QueryBuilder/QueryBuilder.php",“line”:335,“function”:“wrap”,“class”:“OC\\DB\\Exceptions\\DbalException”,“type”:"::",“args”:[{“class”:“Doctrine\\DBAL\\Exception\\DriverException”}]},{“file”:"/snap/nextcloud/211119415/nextcloud/lib/public/AppFramework/Db/QBMapper.php",“line”:139,“function”:“executeStatement”,“class”:“OC\\DB\\QueryBuilder\\QueryBuilder”,“type”:"->",“args”:[]},{“file”:"/snap/nextcloud/211119415/nextcloud/lib/private/Authentication/Token/PublicKeyTokenProvider.php",“line”:88,“function”:“insert”,“class”:“OCP\\AppFramework\\Db\\QBMapper”,“type”:"->",“args”:[{“id”:null,“class”:“OC\\Authentication\\Token\\PublicKeyToken”}]},{“file”:"/snap/nextcloud/211119415/nextcloud/lib/private/Authentication/Token/Manager.php",“line”:70,“function”:“generateToken”,“class”:“OC\\Authentication\\Token\\PublicKeyTokenProvider”,“type”:"->",“args”:["*** sensitive parameters replaced "]},{“file”:"/snap/nextcloud/211119415/nextcloud/lib/private/User/Session.php",“line”:690,“function”:“generateToken”,“class”:“OC\\Authentication\\Token\\Manager”,“type”:"->",“args”:[" sensitive parameters replaced "]},{“file”:"/snap/nextcloud/211119415/nextcloud/lib/private/Authentication/Login/CreateSessionTokenCommand.php",“line”:69,“function”:“createSessionToken”,“class”:“OC\\User\\Session”,“type”:"->",“args”:[" sensitive parameters replaced "]},{“file”:"/snap/nextcloud/211119415/nextcloud/lib/private/Authentication/Login/ALoginCommand.php",“line”:40,“function”:“process”,“class”:“OC\\Authentication\\Login\\CreateSessionTokenCommand”,“type”:"->",“args”:[{“class”:“OC\\Authentication\\Login\\LoginData”}]},{“file”:"/snap/nextcloud/211119415/nextcloud/lib/private/Authentication/Login/CompleteLoginCommand.php",“line”:48,“function”:“processNextOrFinishSuccessfully”,“class”:“OC\\Authentication\\Login\\ALoginCommand”,“type”:"->",“args”:[{“class”:“OC\\Authentication\\Login\\LoginData”}]},{“file”:"/snap/nextcloud/211119415/nextcloud/lib/private/Authentication/Login/ALoginCommand.php",“line”:40,“function”:“process”,“class”:“OC\\Authentication\\Login\\CompleteLoginCommand”,“type”:"->",“args”:[{“class”:“OC\\Authentication\\Login\\LoginData”}]},{“file”:"/snap/nextcloud/211119415/nextcloud/lib/private/Authentication/Login/LoggedInCheckCommand.php",“line”:60,“function”:“processNextOrFinishSuccessfully”,“class”:“OC\\Authentication\\Login\\ALoginCommand”,“type”:"->",“args”:[{“class”:“OC\\Authentication\\Login\\LoginData”}]},{“file”:"/snap/nextcloud/211119415/nextcloud/lib/private/Authentication/Login/ALoginCommand.php",“line”:40,“function”:“process”,“class”:“OC\\Authentication\\Login\\LoggedInCheckCommand”,“type”:"->",“args”:[{“class”:“OC\\Authentication\\Login\\LoginData”}]},{“file”:"/snap/nextcloud/211119415/nextcloud/lib/private/Authentication/Login/EmailLoginCommand.php",“line”:58,“function”:“processNextOrFinishSuccessfully”,“class”:“OC\\Authentication\\Login\\ALoginCommand”,“type”:"->",“args”:[{“class”:“OC\\Authentication\\Login\\LoginData”}]},{“file”:"/snap/nextcloud/211119415/nextcloud/lib/private/Authentication/Login/ALoginCommand.php",“line”:40,“function”:“process”,“class”:“OC\\Authentication\\Login\\EmailLoginCommand”,“type”:"->",“args”:[{“class”:“OC\\Authentication\\Login\\LoginData”}]},{“file”:"/snap/nextcloud/211119415/nextcloud/lib/private/Authentication/Login/UidLoginCommand.php",“line”:54,“function”:“processNextOrFinishSuccessfully”,“class”:“OC\\Authentication\\Login\\ALoginCommand”,“type”:"->",“args”:[{“class”:“OC\\Authentication\\Login\\LoginData”}]},{“file”:"/snap/nextcloud/211119415/nextcloud/lib/private/Authentication/Login/ALoginCommand.php",“line”:40,“function”:“process”,“class”:“OC\\Authentication\\Login\\UidLoginCommand”,“type”:"->",“args”:[{“class”:“OC\\Authentication\\Login\\LoginData”}]},{“file”:"/snap/nextcloud/211119415/nextcloud/lib/private/Authentication/Login/UserDisabledCheckCommand.php",“line”:58,“function”:“processNextOrFinishSuccessfully”,“class”:“OC\\Authentication\\Login\\ALoginCommand”,“type”:"->",“args”:[{“class”:“OC\\Authentication\\Login\\LoginData”}]},{“file”:"/snap/nextcloud/211119415/nextcloud/lib/private/Authentication/Login/ALoginCommand.php",“line”:40,“function”:“process”,“class”:“OC\\Authentication\\Login\\UserDisabledCheckCommand”,“type”:"->",“args”:[{“class”:“OC\\Authentication\\Login\\LoginData”}]},{“file”:"/snap/nextcloud/211119415/nextcloud/lib/private/Authentication/Login/PreLoginHookCommand.php",“line”:53,“function”:“processNextOrFinishSuccessfully”,“class”:“OC\\Authentication\\Login\\ALoginCommand”,“type”:"->",“args”:[{“class”:“OC\\Authentication\\Login\\LoginData”}]},{“file”:"/snap/nextcloud/211119415/nextcloud/lib/private/Authentication/Login/Chain.php",“line”:108,“function”:“process”,“class”:“OC\\Authentication\\Login\\PreLoginHookCommand”,“type”:"->",“args”:[{“class”:“OC\\Authentication\\Login\\LoginData”}]},{“file”:"/snap/nextcloud/211119415/nextcloud/core/Controller/LoginController.php",“line”:314,“function”:“process”,“class”:“OC\\Authentication\\Login\\Chain”,“type”:"->",“args”:[{“class”:“OC\\Authentication\\Login\\LoginData”}]},{“file”:"/snap/nextcloud/211119415/nextcloud/lib/private/AppFramework/Http/Dispatcher.php",“line”:217,“function”:“tryLogin”,“class”:“OC\\Core\\Controller\\LoginController”,“type”:"->",“args”:[" sensitive parameters replaced ***"]},{“file”:"/snap/nextcloud/211119415/nextcloud/lib/private/AppFramework/Http/Dispatcher.php",“line”:126,“function”:“executeController”,“class”:“OC\\AppFramework\\Http\\Dispatcher”,“type”:"->",“args”:[{“class”:“OC\\Core\\Controller\\LoginController”},“tryLogin”]},{“file”:"/snap/nextcloud/211119415/nextcloud/lib/private/AppFramework/App.php",“line”:156,“function”:“dispatch”,“class”:“OC\\AppFramework\\Http\\Dispatcher”,“type”:"->",“args”:[{“class”:“OC\\Core\\Controller\\LoginController”},“tryLogin”]},{“file”:"/snap/nextcloud/211119415/nextcloud/lib/private/Route/Router.php",“line”:301,“function”:“main”,“class”:“OC\\AppFramework\\App”,“type”:"::",“args”:[“OC\\Core\\Controller\\LoginController”,“tryLogin”,{“class”:“OC\\AppFramework\\DependencyInjection\\DIContainer”},{"_route":“core.login.tryLogin”}]},{“file”:"/snap/nextcloud/211119415/nextcloud/lib/base.php",“line”:1000,“function”:“match”,“class”:“OC\\Route\\Router”,“type”:"->",“args”:["/login"]},{“file”:"/snap/nextcloud/211119415/nextcloud/index.php",“line”:36,“function”:“handleRequest”,“class”:“OC”,“type”:"::",“args”:[]}],“File”:"/snap/nextcloud/211119415/nextcloud/lib/private/DB/Exceptions/DbalException.php",“Line”:71,“Previous”:{“Exception”:“Doctrine\\DBAL\\Exception\\DriverException”,“Message”:"An exception
Dec 5 16:31:42 syncloud slapd[769]: conn=2633 op=2 UNBIND
Dec 5 16:31:42 syncloud slapd[769]: conn=2633 fd=10 closed
Dec 5 16:31:42 syncloud syncloud nginx: 192.168.220.88 - - [05/Dec/2021:16:31:42 +0000] “POST /login HTTP/1.1” 500 4510 “-” “iPhone J\xF6rg Hirsch (iOS Files)”
Dec 5 16:31:42 syncloud syncloud nginx: 192.168.220.88 - - [05/Dec/2021:16:31:42 +0000] “POST /login HTTP/2.0” 500 4497 “-” “iPhone J\xF6rg Hirsch (iOS Files)”
Dec 5 16:31:42 syncloud snapd[362]: 2021/12/05 16:31:42.793908 store.go:825: snapid: notes.19040763
Dec 5 16:31:42 syncloud syncloud nginx: 192.168.220.88 - - [05/Dec/2021:16:31:42 +0000] “GET /core/l10n/de.js?v=742d14c5-0 HTTP/2.0” 200 22104 “-” “iPhone J\xF6rg Hirsch (iOS Files)”
Dec 5 16:31:43 syncloud snapd[362]: 2021/12/05 16:31:42.999942 store.go:825: snapid: users.210524196
Dec 5 16:31:43 syncloud syncloud nginx: 192.168.220.88 - - [05/Dec/2021:16:31:43 +0000] “GET /core/img/background.png?v=2 HTTP/1.1” 200 9621 “-” “iPhone J\xF6rg Hirsch (iOS Files)”
Dec 5 16:31:43 syncloud syncloud nginx: 192.168.220.88 - - [05/Dec/2021:16:31:43 +0000] “GET /core/img/background.png?v=2 HTTP/2.0” 200 9621 “-” “iPhone J\xF6rg Hirsch (iOS Files)”
Dec 5 16:31:43 syncloud syncloud nginx: 192.168.220.88 - - [05/Dec/2021:16:31:43 +0000] “GET /core/img/logo/logo.svg?v=1 HTTP/2.0” 200 183 “-” “iPhone J\xF6rg Hirsch (iOS Files)”
Dec 5 16:31:43 syncloud snapd[362]: 2021/12/05 16:31:43.204316 store.go:825: snapid: pihole.210320405

Looks like it is an issue Nextcloud iOS app and it is being fixed:

This Issues shows some code changes are being made.