Currently any station be it world or avatar will not animate properly as the default sitting controller detects sitting then animates stuff, but does NOT animate head wich many animations need so you end up crumpled or spinning.

vrc_AvatarV3SittingLayer >

must have UpperBodyTracked = no change (DisableTracking already has it set to animation), then you can animate how the custom animation intented it to be (+hands also is handy i guess)

This really need to be set on EVERY avatar made or the default need to change.

more chair bugs >

3.0 world station - create your own using station - put controller/custom anim on it behaves

3.0 world station - Dont bother using the udon exsample ( VRCChair3 ) unless you like breaking your ik after use using a chair with custom animation after the udon exsample will not change your tracking now it will also remove ANY custom controller you put on it on a build (udon thing i guess) - exsample gif below

3.0 av station - do NOT toggle them off , they will break! toggle their box collider instead

3.0 av station - do NOT use enter/exit if you want 6 stations on an avatar(that is max) they suddenly counts as a chair and disables a random one

tested on latest sdk ; VRCSDK3-AVATAR-2021.11.08.14.28_Public & VRCSDK3-WORLD-2021.11.08.14.28_Public

(gifs are too big for this site , have mp4's wich are much smaller but not accepted)