Just adding to this now that Chris is back from a (well deserved) break.
Two firmware versions ago everything worked fine with Tidal on my BDP-1. The firmware release which introduced the new login process had issues which appeared to have been fixed with the latest version. However, Tidal is now unusable. It will play for a while and then will skip songs and hang. At this stage the BDP-1 becomes unresponsive and needs to be restarted.
I am assuming it is an issue with the firmware but it could be my device / network. I also appreciate that the BDP-1 is probably at the limits of what it can reliably do!
Any suggestions?