So, based on my own personal experience here with this exact issue… I believe your problem is likely being caused by the 2.4ghz band being overloaded. This happens to some of my 2.4ghz smart appliances if there are too many things connected to the 2.4ghz band (specifically) at one time. What helped me was an inexpensive (plug & play) ‘dual-bandwidth’ WiFi-Extender/Repeater that I plugged-in halfway between my modem & the farthest smart appliances in the house, & I connected half of them to the extender’s 2.4ghz, rather than the modem.
Now, this will not change how much actual activity your actual 2.4ghz bandwidth will ultimately experience… as even with a repeater/extender, it’s all eventually going to run back to the same modem/bandwidth. HOWEVER, it will help to significantly SLOW down & PREVENT future “traffic” jams on the band & keep it from clogging all at once—which is exactly what happens that causes everything to seemingly “disconnect” & go offline suddenly.
As a quasi-fix in the meantime, try disconnecting some things that DON’T require 2.4ghz only, like cell phones, laptops, tablets, TV’s, etc., etc., etc.
And if you do eventually decide to get a dual-bandwidth «––{this’ super important, needs to be connectable to each band separately} WiFi-extender, after finishing setup & connecting smart devices to it ––––pls, make sure to go back into ur phone’s WiFi settings, and under the extenders 2.4ghz network, you UNCHECK the “auto-join” network box from all 'non-2.4ghz-only' devices, so they aren’t constantly connecting & overloading it all over again. Lol Then you’d be right back at square one.
I genuinely hope this helps you out. Best of luck.
