Using the printer for a pumpkin farm, after about 2/3 of it is placed, blocks stop placing. Looking at my character from another account, my head is pointed straight up. Leaving printer mode, I cannot place any other blocks (assuming because server thinks I am looking away from where I try to place). The only way to unstick the head is to fully exit MC and rejoin the server.

Edit: It seems to replicate this issue, it comes from placing the pistons face down from above. Going into a single player world and using the printer will unstick the head. I did observers by themselves and there is no issue, when I try to place the pistons again with the printer, the head gets stuck.

Screenshots of progress before breaking and "broken" character below:

Brutal. Let me know if this persists in v3.0.