Good thought, but I am seeing that it happens 4-5 times in a row, followed by maybe 10 flawless ones, then 2 more that stick... So very random
My spring is in pretty good shape - they always seem to have a kink or two in them. I have a buddy who replaced the spring with an o-ring. Said that it keeps powder from jiggling out of the shells as they rotate. He has an extra so I am going to try that.
He has a 9mm shell plate that he says is not an issue on his press so I will borrow that and give it a go and report back.
I hear you about the "fussyness" of the system. Primer tray is the worst. bits of metal get stuck in the plunger of the seating nut which prevents the tray from sliding and pops the wire off! drives me nuts. I busted a couple of the plastic things that hold the top of the wire. Finally I found an after market replacement for the wire holder that is stronger and easier to reset when it happens.
Best 3 bucks you will spend!
https://www.blackcatworks.com/Hornady-LNL-AP-Brackets_c_12.html