I don't know if this is a bug or not, but I noticed that the enchantment shining animation on items keeps moving when you pause the game (Singleplayer, when pausing actually pauses). It should stop, just for continuity, and if other things do the same thing, then that should be fixed.
I was holding the items in my hand.
Cannot confirm in single player. Look at the timestamps of the screenshots and the glyphs.
Are you talking of Multiplayer ? There is no pause.