ah the joys of NES coding & glitches! I came across this one time, and altered some code that I thought would fix it. Had something to do with screen scrolling not triggering between scenes. I couldn’t ever replicate the issue, so I figured it was fixed. I guess not! Although I don’t know which version of the rom you have.
I’ll take a look and see if there’s anything I can do. Luckily it’s only the 2nd level.
Thank you so much for playing it! Physical copies go into production soon, and can be preordered at premiumeditiongames.com