Recently I've noticed the inverse kinematics not working properly most of the time, I haven't done exhaustive research but my human characters it's especially noticeable even in Lion's Arch it's not working.
EDIT 1:
Another character stood next to mine in Lion's Arch, to me, IK's were not applied to my character, the other player was shown (to me) as using IK. This is weird.
EDIT 2:
Went to another zone and it's working for me now.
There is clearly something bugged here.
GW2 Graphic settings are all high, latest nVidia driver. Card is a RTX 2070 SUPER. OS is Windows 10.