Are there any news about this bug? I can't play the game since 1.13 because of this and the update is amazing. mouseWheelSensitivity does not work and I could fix it by making the scroll speed fastest in the settings. Even then it is not as responsive as it was in other versions
Soory, I'd not find the log. Maybe it happened from my computer :/
Not direct solution but this mod solved this problem for me. https://modrinth.com/mod/immediatelyfast/version/1.9.4+1.21.5-fabric this version (or later I used 1.9.6) of the mod says in its Changelog:
Speed up buffer upload on Apple GPUs
This "reverts" an internal 1.21.5 change which caused a performance regression on Apple GPUs
I hope they will fix this problem for vanilla version too.