Graphical glitches in Tekken 2

[Scallonni]

Polygons stretch occasionally. This happens randomly for a few seconds and then stops shortly after. Maybe like a loop, it repeats every 30 seconds or more. It's very hard to detect, and one possible scenario to reproduce this defect clearly that I found is: playing with Law until stage 8 (the rival is always Baek) and pressing start, waiting for it to happen.
I've already checked all the core setup options in Retroarch, including completely disabling PGXP, testing many alternative setups to the default, ufff... Nothing worked.