Password protected link share shows Missing password (401)

[unix0r]

Hey guys,
i have a shared gallery link that is protected by a password.
Some users (for now its only android and ios) type in the correct password, but the gallery is empty (no photos, but the title of the gallery is visible) and the log shows the error:

{"reqId":"UQM7SeAiGsgyPsEe8E88","level":3,"time":"2019-09-02T13:40:24+00:00","remoteAddr":"xxx.xxx.xxx.xxx","user":"--","app":"gallery","method":"GET","url":"/apps/gallery/s/auswahl","message":"Exception: Missing password (401)","userAgent":"Mozilla/5.0 (Android 9; Mobile; rv:68.0) Gecko/68.0 Firefox/68.0","version":"16.0.4.1","id":"5d6d1bec618ef"}

{"reqId":"UNowFoZKVhrIFwSfP4Et","level":3,"time":"2019-08-30T15:03:03+00:00","remoteAddr":"xxx.xxx.xxx.xxx","user":"--","app":"gallery","method":"GET","url":"/apps/gallery/s/auswahl","message":"Exception: Missing password (401)","userAgent":"Mozilla/5.0 (Linux; Android 6.0.1; SAMSUNG SM-G800F Build/MMB29K) AppleWebKit/537.36 (KHTML, like Gecko) SamsungBrowser/9.2 Chrome/67.0.3396.87 Mobile Safari/537.36","version":"16.0.3.0","id":"5d6d1ce30efd0"}

{"reqId":"RMdhEr3gSRMWWDjN5Akg","level":3,"time":"2019-08-30T09:09:22+00:00","remoteAddr":"xxx.xxx.xxx.xxx","user":"--","app":"gallery","method":"GET","url":"/apps/gallery/preview.public/755194?width=400&height=200&token=auswahl","message":"Exception: Missing password (401)","userAgent":"Mozilla/5.0 (iPhone; CPU iPhone OS 12_4 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/12.1.2 Mobile/15E148 Safari/604.1","version":"16.0.3.0","id":"5d6d1ce3bc2d3"}

The Sharelink is renamed by the plugin:
ShareRenamer

After some refreshing of the site, the pictures will appear, but my the log file is full of these errors.
Any ideas?