A lot of messages about device inaccessibility in logs. Network Problems? HA? Router

Hi, guys
I see a lot of messages like this in logs

Is it regular behavior or smth goes wrong on my HA? Please help
I have HA that runs in Docker
Raspberry Pi 4

Its not normal no, but it could be a bunch of things, poor WiFi coverage, unreliable (or overloaded) internet connection (for cloud based devices), bugs in the device.

The googlecast one seems to be an issue with either the googlecast device (or HA), I get that one too sometimes, and the only way to fix it is to reboot the Google Smart Display.

You probably need to start diagnostics like running a continuous ping on one of the devices and the internet, and see whether you see a correspondence between when the ping drops out, and HA reports connectivity issues.

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