P1S Clunking sound engaging head

So my P1S has started to make a clunking sound when engaging the head. Not sure why and I have no idea what mechanical part is making the clunk.

link to video:

Everything prints ok, it just scares me that something is wrong with some gears or something. Any ideas ?

I know this isn’t going to be any help for you but I just started having this same issue but i thought it was the newest firmware update, I notice you posted this last year. I hope you found out the issue with your printer, kindly let me know when you find out? thanks brother