ha! Was about to post this as a bug too. Happens to me too in max 2023 with corona 9 daily. Box, wireframe and point cloud works fine, but trying to show mesh while autokey is on, just shows a wireframe box.
Can we look into this behaviour? It's quite annoying when trying to animate polygon heavy objects made to proxies as point clouds most of the time, but then to control it rotates or lands/don't hit anything, I want to switch to full mesh preview real quick and it doesn't work and interrupts the workflow having to switch back to pointcloud, turn off autokey, show full mesh, then autokey again etc.