I know there is a post about this bug already. However, it is marked as "available in future release" and it's still happened in the live version. Also, I got an idea about how to fix it so i make a new post.

After testing for while, my avatar is able to be replicated this bug and i fixed it by changing back all of my logo in my avatar expression menu, which is from Sprite (2D and UI) back to Default. (Their texture type originally is Default)

The reason why I change it is the logo become very blury after the beta version (1546) and I fix it by using the method I just mention. (Probably caused by the re-enabling the function of DPID)

We can see a line in the open beta (1551) update note which is related to this phenomenon. It said "Fixed an issue that made avatars' particle textures and Expression icons blurry."

Therefore, according to this line, I hypothesize this is the reason that cause a freeze to the avatar client.

Comment to let me know if there is anything not clear or wrong. Thanks!