I didn't really know how to describe this issue so I recorded a little bit of what was going on.

Video

Perhaps related to #635

It appears that when I toggle the menu with the wand while it's doing this the bouncing will stop but the wand no longer functions.

Noticed these messages in console when I logged in.

Could you post the full log? Or at least all messages logged for Magic.

Also, what Minecraft version?

Well I can definitely reproduce it...

It's odd since it seems to work fine in config, it's something about the in-game commands that is making it go weird.

I just noticed this with the magic hat and the wolf wand. The basic wand works perfectly though.

{ "predicate": { "custom_model_data": 108}, "model": "item/magic/wand_wolf" },
{ "predicate": { "custom_model_data": 110}, "model": "item/magic/wizard_hat" }

Edit: I'm on 1.15.2 paper and heavily modified the resource pack as I'm combining it with other resource packs. Currently this config is only using the modified magic rp.
Edit 2: Everything is set to a wooden hoe in this rp, except for the chainmail armor (not sure how to get predicates working for armor yet).

1.15.2 Spigot with the latest Magic. Nothing relevant is logged.

Seems to be resolved in the latest dev build.