Whenever I'm walking around, sometimes random triangles in blocks of terrain and items in my hand aren't rendered. If I'm standing still and not moving the camera, some items held in my hand, such as a water bucket, will always have a missing triangle.
Every version that I've tested from 1.14.3 and 1.18.1 has the bug, but I haven't tested earlier versions.
Edit: I'm using a resource pack, but the bug remains without the resource pack.
Sorry, your machine is below our minimum requirements.
https://www.minecraft.net/en-us/store/minecraft-java-edition#features2
See near the bottom of this page.