Sync Eror: X-OC-MTime header must be a valid positive integer

Steps to reproduce

Error appears when trying to sync files, not all files seem to be affected, but hundreds are. Not sure whats in common. Only uploading photos from camera roll.

Actual behavior

internal server error X-OC-MTime header must be a valid positive integer

Screenshots

Logs

Server Logs

[webdav] Error: InvalidArgumentException: X-OC-MTime header must be a valid positive integer at <<closure>>

 0. /config/www/nextcloud/apps/dav/lib/Connector/Sabre/Node.php line 424
    OCA\DAV\Connector\Sabre\MtimeSanitizer::sanitizeMtime()
 1. /config/www/nextcloud/apps/dav/lib/Connector/Sabre/File.php line 378
    OCA\DAV\Connector\Sabre\Node->sanitizeMtime()
 2. /config/www/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php line 1137
    OCA\DAV\Connector\Sabre\File->put()
 3. /config/www/nextcloud/3rdparty/sabre/dav/lib/DAV/CorePlugin.php line 492
    Sabre\DAV\Server->updateFile("*** sensitive parameters replaced ***")
 4. /config/www/nextcloud/3rdparty/sabre/event/lib/WildcardEmitterTrait.php line 89
    Sabre\DAV\CorePlugin->httpPut()
 5. /config/www/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php line 472
    Sabre\DAV\Server->emit()
 6. /config/www/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php line 253
    Sabre\DAV\Server->invokeMethod()
 7. /config/www/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php line 321
    Sabre\DAV\Server->start()
 8. /config/www/nextcloud/apps/dav/lib/Server.php line 360
    Sabre\DAV\Server->exec()
 9. /config/www/nextcloud/apps/dav/appinfo/v2/remote.php line 35
    OCA\DAV\Server->exec()
10. /config/www/nextcloud/remote.php line 171
    require_once("/config/www/nex ... p")

Environment data

iOS version: e.g. iOS 16.3.1

Nextcloud iOS app version:
4.8.0.5

Server operating system:
Unraid/ Docker

Web server:
Nginx

Database:
Type: mysql
Version: 10.11.2

PHP version:
Version: 8.1.17

Nextcloud version: see Nextcloud admin page
25.0.4

Start with the iOS sync/upload entry point and compare its requests with the server trace at apps/dav/lib/Connector/Sabre/Node.php:424 and File.php:378. Reproduce the photo-sync failure using the reported iOS and Nextcloud versions, then identify why affected uploads produce an invalid X-OC-MTime value. Done means affected files sync successfully without the server error and the behavior is covered by an appropriate test.