[Node-RED] Inject node not executing at specified time

I don’t know what’s going on, but most of my inject nodes that are set to run in the morning (e.g. 7am on weekdays or 9am everyday) are not being executed. I have no idea why and I don’t know how to diagnose it.

What’s even more puzzling is that when I create a new node during the day to start in, let’s say, 5 minutes, it usually gets executed. And on top of that, one day last week those nodes fired up, even though the day before and the day after they did not.

Do you guys have any idea what the hell is going on or any clues what to check?

What time does Node red say it is? Does it match real life?

Yes it does. That’s the first thing I’ve checked. I doesn’t start at all, I can see that because nodes in the flow have no last-run-timestamp below.