Didn't I show in the examples above that contact has nothing to do with it?

Aniway again,
no Contact with Record-Route in ACK, have error in topos:
call4.log
dump4.txt

no Contact, no Record-Route, no error:
call5.log
dump5.txt

and the set that xavu
I do belive if i set xavu in in-Dialog messages topos will be work correctly, but as sayd @henningw:

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