Not Really a problem with the OS. I have the same problem using my MiFi
on the fringe. I have no problem in town using free Wifi at the Library
indicating that it is more likely a router problem. This may be signal
strength forcing the disconnect.

Rebooting is not necessary that is a Windows thing not Linux. If a
program locks up in Windows you have no choice but to reboot. In Linux
shut down the program and restart it is the fix but have not had to do
that to get the wifi working again as of yet.

People who have trouble connecting at the Library are directed come into
my class for a fix. They usually get told to use Linux for all the
benefits, and I install it for them.