Xiaomi Mi A1 - Noise after update to Android 9 (pie)


I have yesterday updated my Xiaomi Mi A1 to Android 9 (Pie).
I used e-0.9-p-2020051454091-dev-tissot.zip from here https://images.ecloud.global/dev/tissot/ and installed it clean by using adb sideload.

Everything is working fine but sometimes the mobile makes noises. It sounds like tock tock tock… The noise starts and make the noise around 5 to 10 seconds. It seems that it comes, wenn the mobile have to work. For example every time when I take a photo.

Have anybody an idea?

Best L.

after 2 hours in use the mobile starts to freeze and reboot.
I try to use LineageOS with Android 9 and it works. I will stay with it and try change back to /e/ in some month.
Best - L.