Hey NST,
Whilst being a gunner of a rhino last night I experienced the sound bug (all noises getting randomly super loud) & the grey screen bug where all your screen goes grey and only a zone / alt + e fixes it.
Alt + e did not resolve the grey screen bug like it does when your on foot.
I jumped out of the rhino and that resolved both. I thought great, jumped back in only to have the same 2 bugs affect me again. Jumped out again - fine, jumped back in - bugs again.
Seems entering a rhino as the gunner (maybe all vehicles though?) can be a toggle for these bugs similar to zoning.
Shortly after us both zoning in the rhino the same 2 bugs hit me. Both times they started it was when I alt tabbed to another client.
Cheers