This has likely started with think pausing (Physics_RunThinkFunctions). Before any player enters in game, no entities are allowed thinking, which appears to result in this.
One would think that server hibernation would have handled the issue (of not running frames) altogether, but it doesn't seem to really do anything in BM.

We could try hooking even higher - GameFrame, though I'm not sure what side effects that would have. Another way we could go at it is by host_timescale.

We could try hooking even higher - GameFrame, though I'm not sure what side effects that would have. Another way we could go at it is by host_timescale.

Could you go a bit more detail on the host_timescale way? I'm not familar with the think pausing implementation :)

I can confirm that this can happen on Windows OS. The security guard from the first map of "Office Complex" (bm_c1a1a?) can repeat the scientist's magic.

@MyGamepedia
Would appreciate testing this build if you're able.
It's also running on official EU server.

@MyGamepedia Would appreciate testing this build if you're able. It's also running on official EU server.

I can't reproduce. I'll let you know if this will happen again.

Did not fix it. Working on a solution in "slidefix" branch.
The issue is repeatable on stock linux server @ bm_c1a2c.

Looks like they had the same issue when making hl2
https://github.com/ValveSoftware/source-sdk-2013/blob/0d8dceea4310fde5706b3ce1c70609d72a38efdf/mp/src/game/server/BaseAnimatingOverlay.cpp#L504