NOTE: I'm currently working on trying to find solutions and reasons of the issue! Check the Hypothesis section for updates.

ISSUE

Custom blocks were working fine before the latest update (1.18.30). Since that update, I face 2 issues with most custom blocks (that were working fine before):

#1: The block becomes corrupted (has the "update" texture with a cube model instead of having the custom model and the correct texture).

OR

#2: The block is disabled (it's not in the creative inventory anymore).

HOWEVER

The weird thing is that around 1/4 or 1/3 of the blocks still work correctly and some of them have the exact same coding that the corrupted ones or have more complex coding that the missing ones.

HYPOTHESIS / HINTS

>April 24 :

   -   I believe my hypothesis from April 22 is false. I think it's in fact related to components and not model nor textures.

   -   "minecraft:part_visibility" component is essential for blocks like fences that must have parts that become invisible in some cases. However, this component requires the experimental feature called "Upcoming Creator Features" to work, BUT when I activate this feature and put my addon, the game crashes right before entering the world. I'm still not sure if it's because one block has an error or if it's the feature that doesn't work properly. Or if it's related to something else.

>April 23 : It seems like the "minecraft:breakonpush" component is broken. I removed the component in my flowers and that fixed that kind of block.

>April 22 : Here is my hypothesis about the reason of the bug. I noticed that a past texture issue (some blocks with custom model were stretched and missing a row of pixels) has been fixed with this update and my thought is that by fixing the issue, it may have generated the new issue I mentionned above.

BEFORE THE UPDATE (before the issue)

For the current blocks addon I'm working on, I recorded progress everyday so I will put a link to the youtube playlist so you can see what the blocks looked like before the update came out: https://youtube.com/playlist?list=PLPKr-yqRgBwzV3KoS_CcZA9_fypFMGNYW

NOW (with the issue)

Below is a video to show the remaining stuff. Many blocks are not available anymore as you can see (most likely custom flowers, plants, slabs, doors, fences) but some others are still working as supposed (for example the aquatic plants, vertical slabs, and blocks that have different appearance based on how they are placed.)

Video of remaining stuff: https://youtu.be/2bs9Bzy7qlg

CONSEQUENCE ON OLDER ADDON (released only a month ago)

The issue also affects my previous addon that was released a month ago and some blocks in it are now bugged in the way I described in the beginning. I provided an image where there is supposed to be custom sunflowers and orchids, but all you see instead is a bunch of floating corrupted blocks.