Valve seals tore on break in

you are 1000% not going to want to hear this... but you need to fix that and to fix that, you're going to have to figure out why they got all tore up. which... could mean pulling the heads and checking/changing the seals or machine work to make everything work properly.

start by checking your retainer clearance, then make a determination from there.

eta: you may also not have enough clearance on the inner spring; and that's what was grabbing them. so something else to throw into the considerations.