Hello!,when i used Mudfish my connection went wrong (i guessed).as i know so far, Mudfish shouldn’t affected my discord or other than selected application. When i used it my discord’s latency went 900 - 4000ms.
my friend suggested that maybe my traffic balance goes low so i got bad connection? 
As workaround you should use one of methods at Unsupported Games. And if you want to see it officially at Mudfish, please send me some Discord packets using Packet Capture with Mudfish link while using Discord with Full VPN mode.