Removing some station connected to the logistic dispatcher immediately interrupts the delivery of some trains and directs them to the cleaner or depot.

Good day. Thanks for the feedback.

That's how it was intended. Deleting a delivery participant also deletes the delivery. The same will happen when a wagon is connected to or removed from the train during delivery.

If deleting a (empty) station that is no longer needed (unrelated to that station) destroys the entire operation, then it is a fatal design error.

Did I understand correctly that we are talking about supply stations that the train has already left?

Finaly you can find it.
https://www.twitch.tv/videos/1679533954

I tried to fix it (already deployed). But I think there is a bug somewhere else. Where 27 trains at the station come from is not clear.