After router restart home assistant going offline!

Guys, since latest update 2021.9.6 I have the following problem:
I have home assistant running on RPI4, connected to my router over LAN with static IP set both through home assistant interface and in the router to keep it dedicated. I’ve set automatic restarts of the router every day at certain time. Before I did not have any issues with it, but now, after latest updates or even before (for sure did not have such issue running 2021.6.3) I’m having issue, HA going offline after router restart and back online in the following two cases: physicaly replug LAN cable or restart of RPI4

Can anyone from developers troubleshoot the issue and release fix for such attitude?

Define “offline”

I am asking since you mentioned ‘static IP’ for both router and rpi4.

This quite means your router has nothing to do with rpi4 going offline, as they are not depending on each other on the network.

In fact, you don’t even need a router to use home-assistant…

Before devs can fix anything, they need to know what the problem is……

Can you ping the router IP?
Can you ping the rpi4 IP?

Same here.
When reboot router HA going offline until manual reboot

Same here…
what do you mean with ‘offline’ ??

Router’s IP can be pinged, RPI4s not.