Modpack version
1.7.5
(also using the preview build of optifine, but it happened even before I was using that)

Issue
Using any tool with the Brown Magic trait to travel between dimensions desyncs the player state,
this means any hearts you have earned from Spice of Life: Carrot Edition are (visually) removed(this always happens), attempting to sleep in a bed will force you to use /kickme in order to leave the bed(regardless of the sleep charm)(this only happens sometimes), and Actually Additions medium(and I would assume large, but I haven't been able to craft those to test yet) storage crates, the arrow buttons to go to the different pages of storage fail to work(this only happens sometimes), and probably a bunch of other stuff I don't know about.
Swapping dimensions normally removes the desync if it exists.

To reproduce, simply travel to any dimension, and use brown magic to warp to a different dimension, upon warping to the other dimension, all the above things will stop working properly.

Logs
here is the logfile, but I have no idea if anything helpful is in there: latest.log (this uses privatebin, since the size is too large for non pro users of pastebin.)

Thanks for the report, I've relayed it :)

This also seems to happen with draconic evolution's dislocator.

I believe the DE bug has been fixed: Draconic-Inc/Draconic-Evolution#1368