I'm sorry for the delay in responding!

While I am not sure what is causing this glitch on your end, all of this code has had to be reworked for 1.11.x.

Please upgrade to the next osTicket Awesome release when it becomes available next week and it will likely fix the issue.

I should also add that the ability to change priority from the main ticket screen was a mod that I developed.

Unfortunately it hasn't been working properly for some time, and actually osTicket v1.11 broke it completely.

Unfortunately I have removed it for now but I plan on adding it back very soon.