The bolt carrier seems to be getting caught on something slowing it down in the middle of its cycle, both retracting and pushing forward. I don’t see anything that could be the cause of the slow down.
I YouTube’s how to disassemble the trigger group and gave that a thorough cleaning as well and that didn’t fix the issue either.
I've tried lubricating the rails and also cycling the rails dry with no avail.
I will try replacing the trigger group and will see if that is the issue.