[SOLVED] moOde 9.0.5 and 9.0.7: Adding radio station to playlist does not work

[kurt1970]

@TheOldPresbyope , @Tim Curtis , @Nutul I just sent you via PM a movie where I explain how to reproduce the issue, but also how you can workaround it.
As mentioned earlier, I bet on a playlist file locking issue, caused by MPD locking the file when scanning the PL folder.
The reproducer scenario works consistent on my 3 PIs.