When using Minemenu to open a menu from another mod, the mouse still moves the camera while in the menu, and unless you click on a button before closing the menu, the cursor remains visible and moves at a different speed than the camera until you open and close the inventory or pause and unpause the game, which is a little bit annoying.

Minecraft version: 1.12.2 (man I hope it's still supported)
Forge version: 14.23.5.2860 (latest)
Mod version: 1.6.11 (latest)
other mods I tested it with: Enhanced Armaments and Level Up! Reloaded

1.12.2 is unfortunately no longer supported.
If you have the same issue for 1.18 or 1.19, please open a new issue :)