BF6 crashing due to EXPO (memory OC is unsupported)

So I'm IT proficient, work in IT and I spent days trying to resolve this trying everything in software, various things in BIOS but the only thing that solved it is the below as I've put to reddit:

I've got 9800x3d/4090 and solved mine yesterday by disabling EXPO/D.O.C.P. Ram memory overclocking (default preselect nothing custom/fancy). At default though that means I'm running CAS40 2400mhz (vs CAS30/3000mhz, 6000mhz dual) which is really unacceptable and I'd like to request a refund if EA don't decide to fix it. Once disabled I haven't had any crashes whereas before I couldn't make it 5mins into a game. I can't say if Intel/XMP behaves the same as I can't test that.