Not sure why but I cant move items by holding shift and dragging across items, nor by using the scroll wheel. RMBTweak seems to work fine though.

MC: 1.17.1
Mod ver: 2.15-fabric

Are they enabled in the config?

i confirmed, all the features are enabled in the config file.

Are you trying in a vanilla inventory? Try with just Mouse Tweaks and no other mods. Maybe there's some conflict.

Are you trying in a vanilla inventory? Try with just Mouse Tweaks and no other mods. Maybe there's some conflict.

the only other mod that alters inventories would be Traveler's Backpacks, but that mod just adds an inventory rather than altering the player/chests inventory. I will still test your suggestion as soon as I can tomorrow as im heading off the night

Are they enabled in the config?

Are you trying in a vanilla inventory? Try with just Mouse Tweaks and no other mods. Maybe there's some conflict.

Update: Ive tested with exclusively Mouse Tweaks and Fabric API and it seems to be working, I'm just really confused as to what could alter the inventory behavior in my modlist such that this functionality breaks (its not the biggest deal since InventoryProfilesNext implements all these functions too, but it kinda leaves MouseTweaks in the dust and I wanna figure out whats blocking it. Also I have tested the modlist with inventory profiles next disabled so its not that either)

Heres the modlist I was using if you are curious and have any theories;

The other mod that I know of besides Traveler's Backpacks that might alter inventories is the Trinkets mod. Any other ideas?

Not seeing any of the usual suspects here I think; you might have to find by removing some of the mods and seeing if the problem persists.