Description of the issue:

Hanging on cables/ropes in sky by 4 seconds kicks you from server for "flying"

Crashlog:

crashlog will be provided from the test server owner

Versions & Modlist

forge 31.2.9 , IE [1.15.2] [0.15-105 #10] and basic, not modified modlist of the server

There doesn't seem to be a good way of fixing this, I'll allow flying on the dev server the next time I update it. I'll still keep the issue open since it should be fixed at some point, possibly involving a Forge PR.

How might this be solvable on the forge side, @malte0811 ? I have been encountering this issue on several different mods, making them (or at least a subset of their features) unusable.

The easiest way would probably be an event that triggers before the "kicked for flying" happens, and you can cancel the event to effectively say "I understand what the player is doing, they are allowed to do this even if it looks like flying". It wouldn't be a very hard PR to make, I just haven't gotten around to it.