I have an Android tablet - nVidia Shield K1 running Nougat 7.0 (yes, nVidia can't be bothered giving me 7.1.1).
It pretty much sits around nothing all day at home.
When I was running Marshmellow 6.0, the wifi would dropout once a week and required a full reboot to get it working again.
So it seems it's an issue in Android, but with 7.0 I have a reboot once every few days.
Anyone got any ideas (no I don't want to install LinearOS at the moment)
PS my router is this one