Right clicking a vehicle item that can have an equipment grid that's in an inventory the Equipment grid menu normally
Well normally if the vehicle has been placed an its entity data has been assigned, if it hasn't been placed it doesn't have an equipment grid yet. (this mod also finds a way to create entity data for vehicles that have not been placed yet, so you can just right click, and not place the vehicle, pick it up, put in chest then right click)
This mod only adds the extra toolbar helper to shortlist equipment items that are in the inventory. The Ghost Cursor Selection is normal behaviour when remotely right clicking vehicle items to see their grid
If you are seeing something else, probably best to share pictures, message me on discord https://discord.com/users/ceelo0676