Material Instance parameters (that derive from parents using material functions) can have their data shifted or not saved.
1. Open materialinstancebug test project
2. Open Test_Mat_Inst
3. Save a value in "TRYSAVEME"
4. Close and Reopen Test_Mat_Inst
5. Observe that Saved value has moved to the variable above it
In materialinstancebug2, value is not saved at all.
Head over to the existing AnswerHub thread and let us know what's up.