I seem to have a lot of issues with WiFi on my Amazon Fire tablets (Fire HD10 9th gen, 11th gen, Fire HD8 Plus 10th gen). These are all wall mounted and used for dashboards with SharpTools. They'll work without issue for a time and then randomly I'll get a frozen camera image, or some android DNS error page will replace my dashboard.
When it occurs, the WiFi symbol on the Fire tablet will have an exclamation mark and show 'no internet connection'. It is still connected to the router but reporting that it can't connect to the internet. Here's the thing,....when this happens on one tablet, the other three and all other devices connected via that WiFi network are fine and remain internet connected. The fix is to open settings flick the WiFi switch off and on again, select preferences and select the network. All is good again.....until next time.
It's not a DHCP issue, all have static IP addresses (I use static addresses so I can adjust the Fully settings from my MacBook). Router logs show nothing. Has anyone had similar experience or have any ideas?