I'm unable to try the Delphi version of the NETRADIO example (I'm not a Delphi user), but I did try the C version after installing the Media Foundation codec (mfFLAC) mentioned in your screenshot and I was unable to reproduce the problem with that. Are you able to reproduce the problem with the pre-compiled NETRADIO.EXE example (in the C\BIN directory) there, and if so, does it happen every time you click on any of the example's preset buttons?
You could try installing the latest version of the mfFLAC codec, in case you currently have an old version installed...
http://sourceforge.net/projects/mfflac/files/Please also try the latest BASS.DLL build...
www.un4seen.com/stuff/bass.dll