Accesibility setting keeps switching off :(

[FAHMI BASSEM]

Hello!
I'm facing this weird issue, some but not all of accessibility settings keeps switching automatically off, I tried turning battery optimization off for these apps with no luck.

The apps I'm facing issues with are:
Enpass
VolumePie Pro
While Rounded corners and MS Launcher being fine.

What workarounds do you suggest?
Thanks...

I'm using Nokia 8, Oreo 8.1 August security patch.