Found another problem: I have the "look left/right/up/down" button on the helm, as well as these keys are duplicated on the Num keys for convenience and quick inspection. Sometimes, for unknown reasons, these keys start to work in slow-motion mode (as if they take over the function of slow-motion camera transfer), although I have them removed at all.
I don't have more information at this point and how to cause this bug, but it has happened to me twice.

In T157201#2167956, @DnA wrote:

A potential fix is now available on the Steam Profiling branch, see: https://forums.bohemia.net/forums/topic/160288-arma-3-stable-server-202-performance-binary-feedback/ (should be multiplayer-compatible with 2.02 main branch)
Please can you let us know if that works even when you are subscribed to your scenarios?

In T157201#2167719, @DnA wrote:

OK, we hope to have a fix available to test later this week via a beta branch.
If you'd like to try something before that, you can try unsubscribing from the 5 scenarios one-by-one. One or more of them probably cause the CTD. Later you can subscribe again of course.

No, no more than 5.