Unreal Engine Issues and Bug Tracker (UE-24633)

Steps to Reproduce

Make Material A,B
Make Material Instance A_Inst B_Inst from A, B.
Override Material Property "Opacity Mask Clip" of A_Inst and set the value to 1.0. Do nothing to B_Inst.
Do "Replace References" to consolidate B_Inst and delete A_Inst.
B_Inst's "Opacity Mask Clip" is changed into A_Inst's value.

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Won't Fix

Component	Tools
Affects Versions	4.9, 4.10, 4.20

Incorrect override material properties when doing "Replace References" to material instances in Content Browser