Strange authentication failure message on the server while logged in and everything works

[aldem]

Actual behaviour

Server reports authentication failure but application works:

2020/01/09 06:53:42 [error] 28158#28158: *397815 FastCGI sent in stderr: "PHP message: Kanboard: user Unknown authentication failure
PHP message: [error] API authentication failure for" while reading response header from upstream, client: 192.168.1.91, server: k.lan, request: "POST /kan/jsonrpc.php HTTP/1.1", upstream: "fastcgi://unix:/var/run/php/php7.2-fpm.sock:", host: "k.lan"

Expected behaviour

Would be nice not to trigger this message in logs on every access/refresh.

Steps to reproduce

• Install kanboard
• Create user and couple tasks
• Login with app, walk around boards, refresh etc, watch PHP log on the server

Configuration

• Kandroid version: 0.5.9
• Android/Mod version: Android 9.0
• Theme (if you use one): default
• Device type, name and manufacturer: Samsung Galaxy Note 8 (official)
• Kanboard version: 1.2.13 (ubuntu 18.04, nginx + php-fpm 7.2)