static Issues...anybody know why?

I’m no expert in these matters, but from my day to day experience static build up has nothing to do with the cartridge or even the plateau material or grounding. It all depends on the record itself.

I use three different turntables with copper, rubber, leather and/or cork mats and over 20 different cartridges and it’s ALWAYS the same discs that are static. I really have no idea why, but my guess is it has something to do with either the vinyl compound or the manufacturing process. The most annoying static occurs with those thin 70’s and 80’s pressings (Philips and DGG seem to be the worst offenders) and modern reissues. Pressings from the 50’s and 60’s are rarely a problem. One more reason why I prefer these pressings.

BTW all my records go through the same cleaning procedure and are all stored in the same Nagaoka anti-static inner sleeves.

Geoffkait, you have to be kidding. I must be that gullible. Why does a tonearm skate? Oh I suppose you are one of those that does not believe in anti skating. What does geometry have to do with it? VTF maybe. Does a turntable belt rub against the record? This must be an alternative universe.  https://www.shure.com/en-US/support/find-an-answer/stylus-wear-and-record-wear
Read the paragraph entitled "Dust and Grit" and by all means read the whole thing. It is a must read for vinyl junkies.

And, because I know how stubborn you are geoffkait, if you don't believe Shure maybe The Last Factory will do.
https://thelastfactory.com/last-record-preservative/how-do-i-get-rid-of-static-on-vinyl-records-i-e-static-cling/

Off the top of my head I’d say LAST is wrong. But maybe I’m not as gullible as some folks.

Perhaps you didn’t see the comment in the OP,

”When I use my Lyra Delos, no static at all.”

Case closed.

Mijo, I am not sure what bone you are picking with Geoff, but the very same Shure publication you cited has a section on static.  There you will find some real experimental results, some of them showing that friction between stylus and vinyl is NOT a significant cause of static electric charge on LPs.  The mere act of removing an LP from its sleeve is much more to blame.  As is “us”, the shoes we wear, the carpets we walk on, etc.  The Shure article mentions use of electrically conductive vinyl as a preventive measure, but few LPs are made from such material; I think RCA Dynagroove may have been conductive.  Also, when you discharge the surface of an LP you are about to play, that charge is merely shifted to the down-side of the LP.  When you then remove the LP from the platter mat, the crackling sound that can be heard is the charge re-distributing itself over both surfaces.

Shure incorporated a brush into some versions of the V15 that removed static ahead of the path of the stylus; that’s why I suggest that the reason for the OP’s finding with two different cartridges might have something to do with how they are constructed, whether there is a path from the cartridge into the tonearm to drain static charge, etc.