Freezes indefinitely after using @gamer on 1.21.11

[FlipperFlopper99]

Default survival world on easy difficulty, either freezes instantly or a few seconds after.
Does not recover, does not quit with cmd+q, I have to force quit.
I have a few performance mods installed, but the result is the same as not having them.

[3ndetz]

A large amount of terrain/anti-stuck work has landed since this was filed (v0.30-v0.41): the drift-immune BlockPathWalker now owns terrain nav (staircases/slopes/steep parkour climb without drift-freeze — terrain_test A/B pass), an anti-stuck net (2.5s->executor, 5s->reset, 3 resets->wander) breaks local traps, unreachable goals give up in ~20s instead of spinning, and a DISCONNECT reset clears all state on reconnect. Please re-test @gamer on the latest 1.21.11 release and report if it still freezes — with a coordinate/seed if possible.