The problem was a post process of the meta data to remove unprintable characteres. Process that removed the end character from the string...
So configurations of the parts became different for each instance of part...
#rb johan.duparc
#ROBOMERGE-SOURCE: CL 11519600 in //UE4/Release-4.25/...
#ROBOMERGE-BOT: RELEASE (Release-4.25 -> Release-4.25Plus) (v654-11333218)
[CL 11519627 by david lesage in 4.25-Plus branch]
CoreTechFileParser improvement : converting as soon as possible void* into TArray<Vector>, ...
#rb johan.duparc
#jira UE-88554
#ROBOMERGE-SOURCE: CL 11501199 in //UE4/Release-4.25/...
#ROBOMERGE-BOT: RELEASE (Release-4.25 -> Release-4.25Plus) (v654-11333218)
[CL 11501208 by david lesage in 4.25-Plus branch]