Stutter and very low FPS when reentering VR after flight preparation in 2D

I’ve got a 3080 with i9-12900 G2, and still I get lots of stutters and CTD’s, especially in heavy scenery areas. Ctd this morning circling around NYC in C172. I often must “stop” the HallographicShell that randomly appears in the Performance Monitor. This is the cause of many horrific stutters. I sometimes get a freeze or ctd when going out of VR, but most the time it’s ok, either from in flight or from (escape) menu. I start my G2 first from the Mixed Reality Portal, then AddonLinker to MSFS, then plan a flight, start it, open FSLTL and ATC Chatter etc… Then press CTR-Tab or the mapped button on yoke to go into VR. I usually can exit and enter without issue.
Someone on forum mentioned signing out (offline), then sign back in for reduced stutters and CTD’s. Also heard that the Voices can cause ctd’s too. New Nvidia update yesterday… no improvements, maybe a bit worse.