since Nextcloud 21, I cannot access via WebDAV with Suspicious Login enabled.
I currently use Nextcloud 21.0.2 with PHP 7.4 and the problem still persists.
Webinterface is not affected.
Logs show this error while attempting to use WebDAV with Suspicious Login:
TypeError: Argument 1 passed to League\Flysystem\Filesystem::__construct() must be an instance of League\Flysystem\AdapterInterface, instance of League\Flysystem\Local\LocalFilesystemAdapter given, called in /var/www/nextcloud/apps/suspicious_login/vendor/rubix/ml/src/Persisters/Filesystem.php on line 32