Hi Andrei,
I've installed the 6.1.6 version and the bug is fixed, but (unfortunately for me) only with your OCD function <dax:[fieldtype]tracks/>, if I try the example code above, the bug still remains.

My theme uses my own functions which show tracks with different styles from yours (which work fine with different recording sources shown like U2 FLOM website, but fail with guest, authors and so on).

I know that this is annoying for you since you have your built-in functions, but when you'll have time I hope you'll apply the corrections inside a normal loop type as the example code.

Apart from this, your releases are always getting better than EXCELLENT!!!!

Cheers
Emanuele