That happened in the first week we had the model Y we got in March. But it has simply said Home for many, many charges since.
My very first (and so far only) charge on the Model 3 RWD I got last week was logged as split between home and elsewhere. And, yes, I had configured the home location hours earlier.
Just to add confusion, I've noticed that the app sometimes reports the current location of our model Y as being one of the nearest neighbor addresses rather than my own.
I suspect this may be down to a multipath problem causing the GPS to report a location a couple of hundred feet wrong for a while. We have a nearby mountain that apparently has some surfaces with the right position, shape, and material to have that effect on a good Garmin unit I've run here routinely for years.