That happened to me when I had storage almost full. Also when I had a USB installed and apps moved to USB drive.
To fixed that I just reset it, removed USB drive didn't install to many apps just the necessary ones.
Unplug the tv’s power cord for a minute and plug back in.
Turn VPN off if you have one on
This used to happen to me a LOT.
Contrary to what Netflix, and a lot of other people will tell you. It's not really your TV's fault.
The netflix app for TV's, especially the android tv's, is a completely seperate app from say the one on your phone. For the philips TV's, which are actually just rebranded funai tv's, it's the version built against arm CPU's.
The problem with this particular "flavor" of netflix apps, is it's unstabe as all get out.The app is updated quite often, at leaste once a week, and sometimes 3 - 4 times a week. Every time there is an update, the app will completely s**t the bed. My best guess, is the app is getting errors either from DRM or some other security check to home base. I say "my best guess" is because i've not actually had one of these TV's for a few months now (due to it's poor performace, software upscaling to 4k etc, i sold it to a friend and got a better TV)
If memory serves. The version of netflix pre-installed on these devices also comes with 2 other services that run in the background.
When any one of these is updated, you'll get a -100 error (can't connect) Or you'll get the weird one which says "content not available right now" or some such thing.
The reason reboots seems to work:
mainly, because the app has been updated, but not restarted. These funai tv's will leave the process running in the background. Netflix doesn't make things better, because clicking "exit" within the app, merely "tabs" you out of the app, rather than actually exiting it. And reloading the app from within netflix, simply reloads the profile, but doesn't actually restart the app, and it's buddy services.
I would also like to note, that these funai TV's from philips (the XXXPFLXXXXX series android TV's) use EXTREMELY outdated OS.
If you're still under warantee, i'd return the TV, and buy something better, if you're stuck with it tho, the best you can do is put a remote controlled relay on the power plug. they are pretty cheap, and will keep you from having the pull the plug every time you need to hard reset.
This may help, if you have any trouble to connect the net,try to restart the device again. '