Node Red stops working, no errors in logs

I have created all my automations for Home Assistant in Node Red.
Recently Node Red just stops working (automations don’t run, user interface doesn’t run, log remains empty, the watchdog is supposed to restart the add-on if it crashes but that doesn’t happen.
I have now set the node red log level to debug to see whether that gives any insights.
If I manually restart Node Red it starts working again (for some time).
I was wondering whether anyone has any advice on how to solve this issue?
Node Red is the engine of my home automation set-up and my alarm system, basement dehumidifier etc all rely on it.

no error in all the logs? there is a log on the supervisor page, there is one on the addon page as well.

Thank you, I checked the log on the add-on page but not the one on the supervisor page.
Next time Node-Red stops working I will check that log as well.