RPi 4 balenadash unpredictable issues

yesterday after few hours it reverted to browser asking to download google chrome.
after restart it ran for ~ 5 hours without issue
Today after running few hours it went to blank screen - online but with no heartbeat

Log attached
23.10.20 12:30:00 (+1000) scheduler crond[15]: U.log (8.8 KB)


Can you share if there’s something weird going in device health checks? Perhaps the temperature is too high?
That’s a common problem with Pi4 if there’s not enough thermal management

Apologies, I realized that the device is online with no heartbeat. You might not be able to check device health checks.
Have you tried rebooting the device? If so, does it come up online when you do?