From time to time I stay invisible after the effect expired.
It only happens like 1 of 10 times and also on servers and I think that the others also can't see me. But I cannot confirm that, I had problems with not seeing other players, but I don't know if it was because of that.

The invisibility command is applied through a repeating command block (so very rapidly) for 1 second and if I turn it off, I sometimes stay invisible.

After you reconnect everything works just fine.

I hope this can get fixed.

(Screenshots: You can see I'm invisible, but don't have the effect in the Inventory and I'm gamemode 1 FYI.)