If you want, I can expand this into a product page, a technical brief, or a marketing blurb tailored to a specific audience (developers, buyers, or QA teams).
The "repack" likely preserved the XY swap flag. You need to edit the binary. Using a hex editor, locate byte 0x8040 (configuration register) and change 0x02 (swap) to 0x00 (no swap) or vice versa. gt9xx 1085x600 repack verified