Hextech Crafting Screen Bug

Every once an a while ill try to open the hextech crafting menu and the league client will close out and show that it s closed but the text tag that says "hextech crafting" still is on my screen and the tag is not responsive to mouse clicks. i cant then close the league client because its technically closed but if i try to reopen the client i get a message saying i already have league client open and would i like to terminate the existing copy?, this is very irritating i hope you can get back to me