Huh! That kinda makes me hopeful this will get fixed eventually, since you're using a WMR headset. I find it hard to imagine the developers has not noticed something like this!
I've also had pretty much the same issue in Borderlands 2 VR. In that game, I was able to fix it by editing an .ini file. So I wonder if something similar is possible with Minecraft?
Still not able to use Index controllers on v1.17.41
Yes the rendering issue is still there as of version 1.18.2