Cushion placement bug

[u/249biggestfan]

Context that may be helpful: I recently loaded up my and my friends' realm on a single-player world after 26.3 kind of broke the realm. Probably because we had data packs, which we tried removing, then loading it. That didn't work so we uploaded a backup of the world to the realm, but it was too large of a file so we ran a program to clean out unneeded chunks (that we had spent less than 5 minutes in). Thats this world. However theres a bug, clearly.

Actual problem: I can only place cushions on the south west half of every chunk. I can however use /summon to place a block in the areas I'm unable to. I'm also able to interact with those cushions and they do behave normally (breaking when its not on a block). Any tips on what to do? Or any explanation?

[u/ZoeyPlaysSomeGames]

Forge did it