Clouds on the ground happen all the time irl. The simulator also incorrectly draws clouds on the ground all the time. The real trick is finding out which is happening.
Scud is usually associated with a larger cloud formation or a thunderstorm. You typically don’t see kilometer tall puffs of isolated to scattered cumulus emanating straight of the ground. When the sim draws that, it’s usually in error. I suspect sometimes there’s a layer of mist or fog, and the simulator is just drawing its regular generic cloud type in response which looks wrong in that instance. Or perhaps the cloud base height from the downloaded data incorrect. There’s no way to really tell though.
It would be cool if we could “debug” the weather by seeing the weather layers the simulator is downloading from Meteoblue. Without that, you can’t really tell if this is an attempt at real world weather, a bug in the sim code, or bad weather data.