I'm using LWCad 5.2 in LightWave 2018.4 trying to build a house. I've built the outer walls with the Wall tool, that's fine. But when I try to build the inner walls the polygons disappear every time it intersects a wall. The ends are fine but any polygon that touches another polygon disappears.I've tried messing with any option I can find. Add, Subtract, etc. I've never had this problem before.

Update: I've now upgraded to LightWave 2018.7 and it's still doing it. It seems to be random, sometimes the walls work correctly, then they'll start disappearing. It's frustrating because I'm trying to record a video tutorial and I have to keep stopping.

Please send me the object.
http://www.lwcad.com/html/support/support_ask_question.php
Use bug report option.