Sorry it's not great, it was hard to capture.
This is the pack we are using: https://drive.google.com/open?id=1RRAtrzS2AiCRcEMbRDCilQILbZKE6Hl9

I've seen up to 3 stuck at once. We are running it on a Serverminer server. Happens for everyone on the server. Any ideas on what it might be?

Alright, Thank you. I will see if i can do anything about it.

Most likely a desync between server and client.