Hi there, great software you're developing there. I'll try to give feedback as long as I have my license
when the password is wrong, the ts3 bans the ip for a few seconds, it's NORMAL. But your software is not catching the exception:
2017/12/08 02:15:47 [error] 11911#11911: *58 FastCGI sent in stderr: "PHP message: PHP Fatal error: Uncaught TeamSpeak3_Adapter_ServerQuery_Exception: connection failed, you are banned (you may retry in 531 seconds) in /public_html/tsi/vendor/planetteamspeak/ts3-php-framework/libraries/TeamSpeak3/Adapter/ServerQuery/Reply.php:319
and this error generates an Error 500 - Server Error (can't troubleshoot clientside) and the system gets inaccessible for as long as the ban is there, as soon as it ends it gets normal again.