Yeah, it's a Lunar Magic 3.xx issue, to make it work in the standard sized levels change the !RAM_locked freeram to something else, usually the default is free but the new scrolling system uses it so it breaks.
Most likely won't work for any of the new level sizes, still want to fix that at some point, but that might take a while.
Slight overlook: if you are in a sliding animation while the screen is scrolling, you will be sent back to the previous screen and get softlocked. Or, an enemy can come kill you or something. If you’re using this patch, don’t have any levels where you slide around.