Hello. I had the same issue, Russian version, read on Alreader. Yesterday it recovered through the recovery package and again to flash - running like new. My 2011. Posted on 10/10/2019, 10:28:
Hello. The topic did not find - a very interesting package to disable the screen refresh.
After you install the launcher android will be two icons - enable mode without updating the screen and off. Very handy for everything but read as blinking disappears and the book "flies." This mode is canceled at the transition to the standard launcher.
I would not want to, and the program is gone. herelink
the developer's github
on the first version, there is also a link to the second (it's her I put in this post)