Audio Jittering while recording on any mobile browser/FireFox cant record at all

On any mobile browser recording audio in a room while the chat is bussy, the audio stutters and skips. Alone in a fresh room thers no problem, but in rooms with f.e. 26k Messages in and swiping the channels list while recording, the audio is heavily skipping. Checked all browsers(chrome, samsung, variants, Android-based and IOS behave the same) and only Firefox did mint audio at all times BUT since last update FF doesnt show the mic anymore, so Audio wont record at all.

Entering a room after a fresh reload OR scrolling up to lood more messages has no impact.

i tried the following already (after taking a backup) i deleted all medial message of channel -> no diffrence, i deleted alot of messages like 24000 of 26000 total -> no diffrence, i deleted ALL messages of channel -> bingo , clear audio (that might just have to do with what the chat thread does besides recording)