hi, i solved the problem
upgrade this file http://file.xygala.com/?dir=uploads/XY公版/57系列通刷工具包/竖屏/768x1024(mipi)/韵唐mipi
Interesting, upgrading that file is basically loading the correct display driver.
So maybe the 1.73.7 ota file for vertical units have the wrong display driver (horizontal one)? Or maybe it is just the horizontal ota upgrade file? haha.
I guess horizontal and vertical firmware difference now is probably just display driver and touch screen resolution/orientation selection.