Steps to reproduce:
1. Patch channel 1 as an X4 Bar 10
2. Type Channel 1 Part 2, works as expected:
3. Change the Type of part 2 only to literally anything else:
Notice that all the cells have disappeared, and therefore also all my By-Type colour palettes have deleted the information associated with the cells from the show...
Re-ordering the steps (create part 2, set part 2 type, then set part 1 type), works as expected.