Hass.io GUI losing connection every 10 minutes

Suddenly I have an issue with the GUI disconnecting, while I am still able to SSH and change configuration. Running the hassio ha check while GUI is down, it replies ok. I have notifications set up for restarts, but those never triggers.

Where can I check logs or find out what is happening? Very annyoing as this makes my HA very unstable, and the WAF extremely low…