it signifies that your charger is actually receiving power from the outlet, and that it’s sending that power to your car. The only time I’ve had a similar issue as yours with my car was when my breaker tripped offline overnight and the charger wasn’t receiving power. Wasn’t the car’s fault at all in my case.
Same here. I plug the charger in, glance at the screen and the lights on the charger, and walk way. No issues unless the power goes out, or the breaker trips. My car is always on charge when it’s not being driven. Neve had an issue with my 296, nor with my SF90 that I’ve owned for 20-months.