Onn 4K WiFi misbehaving..

Hey all, have had an Onn 4k for a couple months and it's been great.

Today though, out of nowhere my wifi is just showing "no internet". All of the other devices connected to this SSID are working fine. If I join another SSID (same network), everything works fine.

What's really strange is that on the screen where you select a network, it says "no internet", but on the pane on the right it shows "Internet Connection Connected". I am using DHCP, and the device is assigned the same valid IP address regardless of which SSID I connect with.

Not sure where to go troubleshooting wise. Is there a ping utility someone can recommend so I can try to ping my router, dns, etc?

EDIT: Ok so immediately after I posted this, it started working again just as suddenly and mysteriously as it stopped. I watched about 5 seconds of a movie, and it disconnected again..

EDIT 2: Alright now it's connected and seems to be playing fine.. WTF lol

EDIT 3: Nevermind. I backed out and tried playing something else. Now it shows that it is connected, but apps are not able to connect..