Add on and resource pack: prizma visuals 2.1, Stuff it.
Device: Xbox Series X
This issue can still occur without any add-on and resources pack, even with fancy graphics enabled. (Could also have something to do with world size)
This also happens when selecting items in your inventory.
Yes, I have 3 examples of this bug in the latest version
Issue in most recent version:
This bug is still present in the current version, this video was just a piece of another bug report that resolved 2/3 issues.
(prizma visuals used for example since it has more reflective blocks)
After
Before
This issue effects all packs that uses Heightmaps for mobs and some other entity based blocks.
Switch graphics mode to vibrant visuals.
Get a block or an item (nothing specific) in your hotbar.
Switch through the items in your hotbar, it'll freeze the game for a second or two and seems to happen every few seconds after switching to said item.
This also appears under the volumetric block light setting.