Mobile working with Android Auto - limit to voice search?

[scmichel]

Difficult to explain, but I will try.

I have a ton of music on my phone, and when I try saying "Play xxxx" a good portion of the time I get a response from Android Auto saying they will play it, but then nothing happens.

I was wondering if there is a limit to indexing or some other issue of the type that might be causing my issue?