I read through and tested all the solutions here but to no avail : Accessibility services gets disabled automatically
On Xiaomi 12S Ultra with latest MIUI. disabled all optimizations, battery saver etc but it somehow turns off my accessibility without me doing it (or it will just state - not working. Tap for info.) and there's no further info from the system.
What else can I do? It's not app specific as it also happens on FNG and Vivid Navigation gestures.