jcl said that the problem only happens when you use vec_for_vertex or vec_for_bone after animating, so I was able to work around it by doing it before any animation (including ent_bonereset_all). This only worked well for me because I do all my movement before animation, so I don't know if it's useful in your situation.
exactly... hope they release the fix soon, i cant do much with my 3ps system until then and coding a workaround for a bug that will be fixed isnt exactly on my todo list