I had my nose broken by a Romanian AK74, doing exactly that. Make sure that the recoil spring rod assy slips all the way into the cover and that the cover is situated, firmly, into the slot in the receiver when you allow the rod to lock in. Other than that? Check that the recoil spring is strong enough to apply proper tension, As an addittional point: See if the recoil rod catch(?)from a WZ88(Polish Tantal) will work. They have a locking tab which pretty much eliminates the whole problem. I have sold both, so I can't see if a mod can be accomplished. I have always appreciated the WZ88 and considered it to be an upgrade as far as 5.45 AK's are concerned. It has "fixes" to cure most AK problems incorporated into it's design. If mags weren't such an issue, I'd still own mine.
Join the PSL Owners' Group. I'll approve you as soon as I see your request.