When I go to rename tracks in premiere, I can go in an change the text and as soon as I hit enter the track name goes back to what it was before I went in to rename the track.
I looked back through some forums and saw one for a version of premiere that was a couple years old. Basically what it said was that they were noticing issues if the track name was the same as another track that could cause issues.
A typical track naming for audio for me is...
Lav1 D (Duplicate at lower level)
Lav2 D (Duplicate at lower level)
SG D (Duplicate at lower level)
LOCK (use for seperation and timeline organization)
I'm still notiving the issues even if the track names arent the same. But sometimes adding a space or multiple spaces causes the rename to take.