Yamaha XJ6 gear changes

[Jerry1111]

I have an odd problem when changing gears on my XJ6 (2010, 20k miles). Once in a while (once, maybe twice per tank of fuel, sometimes good for 2-3 tanks) when changing up, the gear lever doesn't come back to the position to put the next gear up - gear lever stays up and is a bit "floppy". Usually it happens on clutchless changes, I don't remember now if it happened when changing using clutch.