Okay, I thought this was just a fluke with me but someone else on Leviathan is had the same problem.

While I was crafting (carpentry) I was stuck in the synth position with no synth menu. After about 5 minutes it finally came up. It wasn't lag because chat was going the entire time w/o a problem.

Another player just shouted the same problem while gathering. Simply stuck without any gathering menu. Can not cast return, unable do anything other than chat.

Server: Leviathan
Players this has happened to:
Tienellia Lais
Aldebrand Kepler