This bug is so much fun to use this as a troll but it is needed to be fixed.
This type of bug was shown when you start charging glowstone in the respawn anchor using the dispenser to do this work but if you use it to put Armour automatically, the result is that the glowstone is in your helment slot, which is so weird. This bug is not being affected by a player but also mobs and Armour stands.