Decklink key channel delayed?

We put lower third lyrics under our livestream. The route is as below

Propresenter on Mac Mini M series > Decklink Duo 2 mini in enclosure > ATEM 2 me Constellation 4k

Sometimes our key seems to be some sort of delayed? Has anybody seen that issue before? See picture attached.

Note; this is a screenshot from YouTube from our client. But we also see it right in the multiview.




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maybe its problem with propresenter .. I dont know him .. Im using Caspar CG and FILL + KEY is allways in sync .. Im using QUAD Declink and using 2x K+F outputs simultaneously ..