accessibility auto turning off

Hi guys,
I have looked on the internet and followed the instructions (allow apps to ignore battery optimization) . But the Navbar apps accessibility keeps turning off after a bit. Also, i have to keep re enabling the Google now from voice and input for it to work on pressing home button.
I am on MM, my variant is kiw-al10. My phone is rooted and bootloader is unlocked.
PS. i have Google assistant enabled using xposed.

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