Black rectangle on CyanogenMod (AOSP) browser with Quick Controls enabled

Question

I have fallen in love with a browser built in CyanogenMod 12.1, but there is a problem with a black rectangle which has shown about 3 days ago and it do not disappear after rebooting the device



I discovered that the black bar is visible when I enabled Quick Controls, but I do not want to disable it, because it is a major advantage of this browser.



My device is Motorola Moto G 2nd gen (x1072).



Screenshot



black rectangle on AOSP browser


— FieryCod | Sources

Answer

This problem has known. You must disable all accessibility service in accessibility setting. But this is bad because the developer didn't fix this bug till now


— user193912 | Sources

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