Weird interaction glitch between SNES core and CPS2 core Super Street Fighter II in Analogue Pocket

[c0de90e7]

Steps to repro:

• load SNES core and load Super Street Fighter II (Europe) ROM
• after a bit, quite the SNES core
• go to Capcom CPS2 core and load Super Street Fighter II The New Challengers (World ...) ROM
• start a match and see how the the 1/3 portion to the right side of the screen is glitchy with semi transparent ( or fast swapping between the sprites that should be drawn and other sprites/shapes ). Then lose the match and see how the game over screen shows other weird sprites in the same rightmost 1/3 portion of the screen.
• turn off the Analogue Pocket completely and turn it on again.
• go to the Capcom CPS2 core again and load Super Street Fighter II The New Challengers (World ...) ROM again.
• start a match and observe previous glitches are still happening.

Steps to get out of the glitchy state:

either:

• go to Capcom CPS2 core and load another ROM that is NOT Super Street Fighter II The New Challengers (World ...). Just load some different enough game, not just a different region or so, load a completely different game.
• go to the Capcom CPS2 core again and load Super Street Fighter II The New Challengers (World ...) ROM again.
• start a match and observe how the described glitches are NOT happening anymore.

or:

• go to SNES core and load another ROM that is NOT Super Street Fighter II (Europe). Just load some different enough game, not just a different region or so, load a completely different game.
• go to the Capcom CPS2 core again and load Super Street Fighter II The New Challengers (World ...) ROM again.
• start a match and observe how the described glitches are NOT happening anymore.

Initial non-formal description and detailed video with multiple steps/tests:

I reproduced a very weird interaction and glitch state in a CPS2 game running on the Analogue Pocket. I say weird because this happens only after loading a similar ( the same game that was ported to the SNES ) game on the SNES core. The video is quite long but first 5 minutes or so may be enough to get the idea ( however, I do further steps and explanations so that a more nuanced grasp can be obtained ) and I add my - vague - hypothesis from 34:00 to the end.

youtu.be/nkd13h78Kpc

[jotego]

Thank you for the detailed report. I think this is an instance of the bug reported in this other issue

I am closing it here to track it in one place.