Some items had broken animations in first-person view since 1.20 was released, and I'm showing here that the breathing, bouncing up and down, and attacking or mining of these items in first-person view are not correct compared to regular Items.
Broken animation Item list:
Warped Fungus on a Stick
Snowball
Campire
Soul Campire
Music Disc (Including all variants)
Item Frame
Glow Item Frame
Flower Pot
Coal
Charcoal
String
Redstone Repeater
Redstone Comparator
Hopper
Nether Sprouts
Kelp
Sugar Canes
Cake
Arrow
Tipped Arrows (Including all variants)
Chain
Apple
Trial Key
Cauldron
Wind Charge
I have uploaded four examples comparing how to breathe and attack correctly and incorrectly in first-person view; please see the attached files. If you want to check it yourself, make sure to create a Flat World first, then grab the items I put in the broken animation item list, and finally you'll see how it breathes (make sure your view-bobbing is on) and attacks in first-person view. You'll notice how they differ from regular items.
Related issues
is duplicated by
Attachments
Comments


What do you mean by incorrect? Do you refer to the position of items when using 'attack'? Please attach a video showing the issue, and explain your point of view.

[MCQA] Justyna Oleś I already did, I'm sorry if I don't upload it sooner because there was a problem when I uploaded the video earlier the mb is the problem, it was too big, but don't worry I've already Optimized it.

Please do not mark reports as Private unless they contain an exploit. Never share personal information on this bug tracker.
Please do not add "affects ..." comments. As the reporter, you can just add those to the Affects Version field directly. It would be helpful if you would delete those unnecessary comments to reduce clutter.

Can confirm. When you swing with your hand, the item in your hand goes down much lower before returning back up to its normal position in your hand.
As seen in:
[media]
[Mod] Umija5895M oh sorry for being rude, I'm trying to figure out how to use mojira, I'm just a new reporter here.

Can confirm.
Steps to reproduce:
For the attack/destroy animation
Give yourself mining fatigue (not necessary, but will help in visualizing the bug)
Pick one of the affected items from the list.
Equip the item in your empty hand slot and use the attack/destroy button.
Compare the attack/destroy animation between an item from the list, and one that isn't.
As for the bobbing animation; you can compare the bobbing differences between items on the list and ones that aren't, it's subtle, but still noticeable to some degree.
Observed results:
The attack/destroy and bobbing animations for the items listed are inconsistent with those of all the items that haven't been listed.
Expected results:
The attack/destroy and bobbing animations for items held should be consistent/the same for every item in the game.

Breathing bob animation can be fixed by changing animation.player.first_person.breathing_bob from this:
"position": [ 0.0, "variable.bob_animation * math.sin(q.life_time * 45.0) * 0.5", 0.0 ]
to something like this
"position": [ 0.0, "variable.bob_animation * -0.5", 0.0 ],
"rotation": [ "variable.bob_animation * math.sin(q.life_time * 112.5) * 0.5", 0.0, 0.0 ]

Interestingly, this affected items list contains the exact same items as MCPE-169754

I believe this relates to MCPE-178674 as the custom tools have the same swing animation as the items listed in this report.

This issue also affects the items listed below as of the 1.21.20.21 preview:
Breeze Rod
Ominous Trial Key
Spyglass*
Trident*
Crossbow*
Wolf Armor
Brewing Stand
*These items have a broken animation that is a bit different from the rest in the sense that their animation plays very very slowly, and the item often slides in a strange direction instead of just vertically. (If a better explanation is needed, I'm willing to add attach a video.)
It is also interesting to note that the first-person view of cobwebs is completely bugged and consists of just a gray and white squares. But this is mentioned by @HARYAMC_ at MCPE-169754.

@unknown spyglass trident and crossbow are attachable items, they simply have unfinished animations, and their geometry is broken that's why they bob diagonally instead of up and down which they supposed to do according to the data-drven animation which is also wrong

As of 1.21.30.23 and 1.21.30.24 Preview, these also affects Bundles and Mace as well.

Previous comment is not correct; Mace is unaffected. Bundle is affected though.

@unknown are you sure? Mace attack and breath bobbing animation is different for me on 1.21.30.24, tested on Preview on Windows and Beta on Android.
Update: Mace no longer affected by this issue, as the changes to Mace has been reverted in the latest beta/preview (1.21.30.25)

This issue seems to also affect all 17 variants of the Bundle in 1.21.40 and in the 1.21.41 Hotfix.

Something to add to this bug:
It seems like one of the most common issues for these items is that they have a format version that is at least higher than 1.16.100
As an example: here is a bug report related to this issue: MCPE-178674
Also, I know the fix may seems as easy as “just downgrade the format version for these items!”, but is likely that they have some necessary components that are only found on format version 1.16.100.
Just like rainvay mentioned, the temporary bandage solution may be attachables. Some sees it as their worst nightmare. (Also due to duplicate IDs, snowballs and arrows can’t be fixed by attachables)

Does this issue still affect the 1.21.80 release or the 1.21.90 preview series?