MGS1 Ron isn't working properly and I don't know how to fix it

It sounds weird but the cutscenes after I kill revolver ocelot all have a weird background in it like a rocket. And I can just about see what's happening in the cutscene. I thought Psycho mantis might be doing this to snake but when I started fighting the 'Cyborg' he was supposed to be invisible but I could see him with that background as his body. I know it sounds weird but I don't know how to fix it and I don't want to lose my saved data.

I forgot to mention that I'm using the ePSXe emulator.