MIDI track: it doesn't remember its assignment

Cubase
1

Hi, after update 12.0.51 I’m experienced of MIDI track that doesn’t remember its assignment after re-opening the project.
The MIDI track is assigned to BFD3:

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2449×573 30.2 KB

When I close and re-open the project it changes every time:

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1385×571 28.3 KB

So, I need to set again the MIDI out, every time. Anyone the same?