I encounter the same problem. Oops
The bug still exists in v1.18.12.
I've tested and found that when using my old worlds created in former versions, it is still of poor performance. However, when I use the latest version 1.14.60.5 to create a new world and play, it seems to be better. But only a little.
Affects 1.18.12. But in my game, I cannot combine even minecraft:repairable is deleted.