Devices connected via wifi are, iPhone Xr, iPad Air 2019, iPhone SE. Two kindles A 4k firestick and Moto E4.
The firestick, iPhone Xr and iPad are having the issue. The firestick particularly is annoying as I it just drops connection when you're streaming something, At the same time the iPad and iPhone drop but nothing else.
I've reset all the problem devices back to factory today, and the router and so far it seems to be okay but I've not had chance to try the firestick.