Bose Soundtouch problems with >> Tag View

[mick3]

I have enabled >> entries again. When I try to select any folder with a ">> Tag View" entry an error occurs in the speaker.
my telnet command: ext list 0$folders$f73$f81
response: Error in browsing container Error = 1647
When I select a folder without such an entry all plays fine.
Obviously the Soundtouch firmware has a problem. Unfortunately I have not found any post with this error code (yet).
Do you think it would be too generous to allow this one property in starter edition?