HASS freezing randomly

Hi there,

I’ using Hassbian (currently v0.67.1) on a Raspberry Pi 3 B+ since a few days.
I’ve added letsencrypt with duckdns, the router adresses a static IP to the Pi.
To my configuration.yaml I added only
-mqtt (with some switches)
-automation which syncs google assistant.
-device_tracker (nmap)

In general everything is working, But I’m getting a lot of errors.

-Error in logging seems to appear every time I refresh HASS in Chrome (-> /srv/homeassistant/lib/python3.5/site-packages/aiohttp/helpers.py)

-Ended unfinished session comes in different variations for different components
always the form components/some_component/__init__.py
sometimes its a (WARNING), sometimes as a (ERROR)

Also I get some Timing errors from time to time which doesnt seem affect the stability.

When the system freezes the Pi disappears completely from the network. No ssh, no apperance in my router. I can’t find a pattern why and when it happens.

Do you have so wise advices for me?

What kind of power supply are you using?

I’m using one with 3A (measured). Should be enough under any condition

I’m getting freezes also since last two updates. All hangs, can’t SSH, or run WebGUI. I need to unplug power and replug

Started happening to me on v0.69.1 on my Raspberry Pi 3. Thinking it could be load or memory related as I have other things also running so planning to move over to a Raspberry Pi 3 B+ with a nice big SD card to see if that helps shortly.