The bug
When a block shares a block space with an item frame, the comparator cannot detect the rotation of the item in the frame.
To reproduce
Place an item frame with an item inside it and a comparator behind the block it's on.
Place one of the affected blocks, for example a torch, in the same block as the item frame.
Turn the item
→ The comparator turns off
Linked issues
is duplicated by 15
MC-45949
Signs disrupt item frame comparator output
Resolved
MC-48310
Itemframe redstone signal not updating/outputting when torch placed on same block as the frame
Resolved
MC-48652
Comparator doesn't give an output from a item frame if a button exist in the same block.
Resolved
MC-51547
Vines, Torches Etc. Break Comparator / Item Frames Redstone Signal
Resolved
MC-67359
Item frame comparator not outputting if frame on same block with torch
Resolved
MC-92400
comparator no signal
Resolved
MC-111367
Item Frames Do Not Send Comparator Signals When Submerged
Resolved
MC-123437
Redstone comparator does not detect item frame
Resolved
MC-133837
Item in item frame not detected by comparator if across from a sign or banner
Resolved
MC-136081
Item frames do not activate comparator when placed underwater
Resolved
MC-136172
Waterlogged item frames don't work with comparators.
Resolved
MC-138682
Comparators not taking redstonesignal of itemframes, that are underwater
Resolved
MC-158207
Redstone Comparator isn't working with frames, when there's torch on frame.
Resolved
MC-159064
Item frames not powering comparators when placed in the same block as a trapdoor
Resolved
MC-164372
Comparator not recognizing item frames when in blocks
Resolved
relates to 1
Attachments
Comments 36
This posts issue seems to be solved as of Snapshot 14w25b, but the issue with it not outputting signal of an item's angle in the item frame with a block such as a button, torch, vine, or ladder is still an issue as of 14w25b. The post said as duplicates explain this in more detail.
Still affects 1.8 pre-2
Unsurprisingly, affects 1.8 also.
Still affects 1.8.2-pre4
Affects 1.8.4. Gah.
Affects 1.8.6 - how am I ever going to get my secret torch passageway working at this rate :s
Affects 1.8.8 and 15w32c.
Affects 15w50a.
Affects 1.9-Pre 2 :/
Confirmed for 1.9
Still in 1.9.1-pre3
Still in 16w15b
Affects 1.9.3-pre1
Still affecting 1.9.4
Affects 16w32b. Some day my bugfix will come...
Confirmed for Minecraft 1.12
Affects 18w22c
Affects 1.13-pre1
Affects 1.13-pre2
Affects 1.13-pre3
Affects 1.13-pre4
Confirmed for 1.13.1-pre1.
1.14 first 2 snapshots: same
Tested with difficulty in 19w05a
Affects 19w08b
Also blocked by MC-154499 in 1.14.3-pre3
No longer blocked in 1.14.3-pre4
Affects 1.14.3, 1.14.4-pre1, and 1.14.4-pre2
Affects 1.14.4-pre3
Affects 1.14.4-pre4
Affects 1.14.4-pre5
Affects 1.14.4-pre6
Affects 1.14.4-pre7
Affects 1.14.4
Glad to see this is finally assigned after "some" waiting 😃
Felix Jones
Is this still a concern in the current Minecraft version 14w20b / Launcher version 1.3.11 or later? If so, please update the affected versions in order to best aid Mojang ensuring bugs are still valid in the latest releases/pre-releases.