Scrolling through the Hotbar when ingame (Multiplayer and Singleplayer) with the trackpad/touchpad becomes impossible or very hard very quickly as the selected item box refuses to move, moves slowly or gets stuck and possibly reverses scrolling direction for seconds at a time making it impossible to use
This happens in all 1.13 pre-releases and snapshots but not in 1.12.2 stable
Proof (as unlisted youtube video because the video file was too big)
Related issues
relates to
Comments

Marking both as related, I'm not too sure about how those belong together. They're probably all an issue with LWJGL anyway.

Still not fixed/ betapre-10

You can update your report yourself.

I'm on a Mac (10.13.6). Same issue. Including not able to left click on trackpad/touchpad within inventory.

Please check if that's still an issue for you in Minecraft 1.14.3 Pre-Release 2.
Possibly duplicate of MC-42367? Relates to MC-122296.