The bug
Every entity that is invisible you can see while you're on Spectator mode, not working with Item Frames.
How to reproduce
/summon minecraft:item_frame ~ ~ ~ {Invisible:1b}
Attachments
Comments


Can confirm bug still exists on 20w27a.
Can confirm in 20w49a. To help reproduce this issue, I'd recommend that you use this command:
/summon minecraft:item_frame ~ ~ ~ {Invisible:1b}
Can confirm in 20w51a.
Can confirm in 21w03a.
Can confirm in 21w06a. Also affects glow item frames.
Can confirm in 21w08b. Video attached.
Can confirm in 21w15a.
Can confirm in 1.16.5 and 21w18a.
Can confirm in 1.17.
Can confirm in 1.17.1.
Can confirm in 1.18.1.
Can confirm in 1.18.2.
Can confirm in 1.19.
Can confirm in 1.19.2.