I’m sorry for the ongoing trouble. When I reviewed additional logs from your recent Pro Passthrough prints, I noticed that the height measurement taken before each print after the material was moved varied by as much as 3.5 millimeters. In addition to supporting the portion of your material that is sticking out of your unit through the Pro Passthrough slot, it may help to double-check that your material is lying flat in the bed for each print. For example, a lot of customers use small pieces of scrap to print these pins available in the free laser design section: Honeycomb bed holdown pins
Will you please let me know if this information helps on your next Pro Passthrough print?