I'm currently posting this with TornTools enabled.
I have recent moved from kiwi browser to Firefox on mobile (Google Pixel) to keep playing with extensions.
I have removed all extensions and the problem still persists
When typing in any chat, the current page I am on scrolls down with every key press.
If typing a long message on the events page for example I suddenly find myself seeing events from several days ago and have to rescroll to the top
I have tried using chrome and it was ok, so seems to be specific to Firefox app, with or without extensions enabled