It looks like it's not "un catching" from the op rod catch. I can ever so slightly pull the op rod/bolt back and it releases. When I push down on the follower, everything "looks" like it's trying to work.
The follower goes down, the op rod catch goes down. The op rod just won't release from the catch when op rod/bolt is not pulled back, only slightly, first.
Also, there seems to be more forward pressure on the op rod on this rifle than my SA rifle. Like the op rod spring is stronger.