7061fa7cf1
The issue here is that the particle instance modifier (pimd) accesses data from the linked particle system modifier (psmd). This data is only correctly generated when the psmd is enabled; here the design violates the modifier principle of providing valid object data (or rather DM) even when disabled. The solution in this case is to make a custom isDisabled check for the pimd to see if the psmd is enabled. This means the pimd won't work for disabled psmd, but doesn't crash.