This made my day, thank you so much. :) I've been really busy the last few months, I've kinda become primary caretaker for my dad as his health has declined. I miss posting news and being active on the site but I'm happy to be thought of so...
Been awhile but I remember this happening when the video settings glitched out moving around TV's, try resetting them by turning on the console holding Y and right trigger. This is supposed to reset the settings to defaults.
I made an update last year that improves RGH3 on phats using southbridge overclocking. So no reason to go for FPGA solution. Even rp2040/rp2350 is a better choice for glitch.
Here is yesterday's rewrite with additional checks against video...