Song progress bar

[Harmonium]

So I have had this problem since day one playing my bard. Quite often when i start casting a song my spell progress bar/window will just *poof*

The song will still be playing and it will finish just fine, but I have to pay close attention to see the effect land in chat to keep all the songs i'm twisting up.

So I'm not sure if this has been a problem seen by other bards, or if its just an issue on my client. If its my client any tips for tackling this issue would be appreciated!