Upon death, all itemframes disappeared from my world. (Only tested in one world.)

No datatags i could find fixed it. (Tested with display item, PersistanceRequired, and Invulnerable.)

ItemFrames reappear when reloading the world. (Exiting world/reloading by trans-dimensional portals. (Tested with The End.))

The ItemFrame entities appear to first disappear once the camera stops moving on the game over screen. If respawn is clicked before this, the enteties remain unaffected and visible.

Attachment; World information (Entity count, root pie chart)