I've wanted to know if holding right click to store lots of individual items with a bundle is exclusive to 1.19.2 or higher, because I feel like the tweak is really handy!

So some mods might be conflicting with Mousetweaks?

Hm?

I don't remember when I added it, I think that was on the version which added bundles.

Well I would say that bundles didn't come with that feature, do you think mods that directly add vanilla bundles do that, like quark?

Yeah, they were added to the game but aren't obtainable. Mouse Tweaks hardcodes this behavior to the vanilla bundle item since there isn't really a generic way to tell if some item acts like a vanilla bundle.