[next?] Cut ERZ3 boss' lava not moving properly/ possible UDMF issue with Linedef type 321: Trigger After X Calls – Continuous

I don't know for sure if this is a next build UDMF issue, but katsy suspects it might be (99% possibility by their estimate)

whatever the case, something broke the ERZ3 cut boss mod's lava as it doesn't work correctly. Here is how it's suppose to work

Here's what actually happens

What I can figure out is that something may have happened with Linedef type 321: Trigger After X Calls – Continuous to cause it to either not work properly, or the way its programmed was changed.