cannot rename tracks

I have Geforce GTX1080. In the video you see that I cannot edit the track name in the track list of the project window, and also not in the inspector. But I can edit it in the channel setting window and also in the mixer(the latter not showed).
https://drive.google.com/file/d/1_7ExlaGMf5HLnSctXT9mxUWEzDKG5biO/view?usp=sharing