I'd like to suggest a change in the rule #2 (both in Game and Category Rules). To clarify, the speedrunning timer should end when the final message "Leaving in 0 seconds" fully appears in the bottom right corner of the screen.
The reason for this change is that delays in internet connection (ping) can cause a delay in being teleported to the lobby even after the final message of "Leaving in 0 seconds" is shown, especially in non-solo games. This creates a minor undesirable addition of seconds to the timer, thus it is possible to miss new records by a margin of unmanageable seconds.
I hope this suggestion gets accepted at the earliest.
Although it is a fairly strong suggestion, changing the said rule would render all the other speedruns invalid IF there really is any difference in time. I myself and the other mods tested your assumption and there really isn't any difference. We did solo, duo and trio runs and compared the times. the difference was about 0.024 in average. So we can safely assume that the change is unnecessary.