Apex Legends Crashs to desktop, no log files

I recently upgraded my CPU to a 9800X3D and 64gb of RAM. Enabled EXPO, so it runs 6000 MHz CL30, and I started noticing stutters on Apex Legends. So I disabled EXPO and ran my RAM at 5600 MHz CL32, and the stutters were gone, but my game started to crash every 3-4 games, directly to desktop, no error messages.
I don't know where it could come from because other games run fine (BF6 Beta, DCS World, Star Citizen for example, which use a lot of RAM).
I even tested the RAM stability with MemTest64, and no problems here.

My questions are simple :
- Do you have the same problem ?
- Do you have any workaround or solutions ?

I will edit this post as I continue to test. I'm currently trying to switch NVIDIA Reflex to enabled only, not + boost

MSI X870 Gaminf Plus Wifi (latest bios)
AMD Ryzen 7 9800X3D
NVIDA GeForce RTX 3060 Ti 
Corsair Vengeance 64 Gb DDR5 @5600 Mhz CL32
750 W PSU