Tinker Board S R2.0 x11 server does not refresh graphics propoerly

[btwin 0]

Hi,

I have installed Tinker Board S R2.0 with the newest tinkerOS Debian 10 V3.0.11. The X11 server does not refresh  graphics windows properly.  The problem can easily be recreated  running xeyes program (in x11-apps package). The older Tinker Board S with debian 9 does not have this problem.

By the way, Is it possible to install Debian Stretch on Tinker Board S R2.0?

Thanks and best regards,