Clearance from the seal to the inner spring is very tight. It seems the top just tore. I didn’t like those damn springs/bands from the get go I knew I should have left them off.
having gone thru this in the not too distant past, i know the frustration. in my case it was the keepers and retainers that tore up the top of the seal. an annoying but fairly straight forward fix.
i don't know how much of the work you do yourself, but key to this here is the correct machine work for the seal and vice versa.
so i'd run it back and be sure you're machined for that type of seal, and then double check all the critical tolerances and make sure you don't have contact from any of the components there.