audio track by track preset does not work after restart

When I select a track preset with an audio track that works perfectly.
for closing cubase I save the project.
If I then open the project back then play all audio tracks with track preset is not anymore.
by the channel settings you see bij the input “no source” and you can no longer select it.
I can only do one thing and that is the audio file copy them to a new audio track and start over.

the next time you restart, again the same problems …
Who can tell me how to solve it or what I’m doing wrong because i have no idea ! :frowning:

NOBODY THAT PROBLEM ??? :confused: