Some soundfonts have a default bank number a default a patch number that is higher than zero.

1. Download 045_Florestan_Pizzicato.sf2 (or any SF2 where the default patch is non-zero)
2. Drag it into the Song Editor
3. Try playing a note

This is minor, as the SF2 still works great with LMMS, except when browsing sounds, the SF2 doesn't make a sound.

The request is to allow SF2's to "automagically" choose the first patch that is available for initial preview and playback.

Pictured is an example of a free soundfont that has a "default" patch of 45.