Do you mean the 'side panel' falling off? If so, no. I'd be surprised if all three lugs are fitted correctly.
Triumph bags I have a worry they will, so I pop a couple of bungee cords over the rear seat on my 2018 Speedmaster This takes some of the weight off the racks as well they only have a very low recommended limit Do not use the triumph shoulder straps over the seat the buckle will fail or did on mine