Hi players on my server experienced a very weird glitch. Whenever you go through a portal the item in The number 1 slot in your hotbar dissapear. I have no idea how to fix this. The only thing I THINK I know is that multiverse-inventories has something to do with it, because everytime you go to another world it also happens. All help Are appreciated!
Try it totally plugin free. If it doesn't occur when you have no plugins loaded, then reintroduce them in like groups of 3 and when the problem restarts, you'll have it narrowed down to three then can further narrow. Also what Spigot version are you using?