I searched specifically for this thread… I know exactly what the OP is talking about. Just starting this Tuesday, the on demand feature no longer worked for me.
Being able to select a song, even if it was only once in a 24 hour period, was one of my favorite features! I chatted with Slacker support just now and the rep stated that this was never a feature of Slacker on Tesla and “I was just getting lucky” when I requested a song. Something definitely changed early Feb though, since it had worked essentially 100% of the time (with the 24hr same-song request limitation) over the 7mo I have had my model 3.
So it sounds like Slacker doesn’t officially support the feature on Tesla’s (if the Slacker rep is to be believed) but we somehow had it under the table... But now something has changed and we are out of luck?
We need to campaign Elon to get this officially working... I definitely will miss this feature!!
(Btw, I wonder if it was only a subset of us lucky ones who had this feature?... when I had told my other model 3 owner friends about this feature, they said it was hit or miss for them, unlike my near 100% success rate)