Certain Vanilla Files Crash CEE When Saving

[AsteroidPizza39]

Certain bfevfl files will crash the program when saving, even if no changes are made. Trying to save the file in EventEditor tells me that there are placeholder nodes, and it cannot save a file that has placeholder nodes. This is in an unmodified vanilla file, so it should be able to handle this. The specific file I used to determine this issue was romfs/Event/EventFlow/Hebra_SkyRingChallenge.bfevfl.zs.