All Texture Pack .mcmetas Are Now Incompatible With 22w17a

I would expect that texture packs would stay consistent up until 1.19, but in this snapshot my homemade texture pack is no longer compatible. I have no clue what caused this or if Mojang did it intentionally.
(It would help if someone could comment on my post)
And yes, 9 is the correct format. but I expected it to stay consistent until 1.19 and then it changes.