Rare crack sound with new MuseScore 2.1

Hi, gang!!!

I wonder if the following behaviour is a general issue, or just an isolated case:

I use Linux, Ubuntu Studio 16.04.2 LTS, with all the last securities updates, into a 64 bit machine.

Now I downloaded the last MuseScore 2.1 version and I tested with "my" music works (actually, not mine of course).

And... now I can hear a really annoyed crack sound at some french horns notes. The sound is like the whip sound. The crack is only present into the french horns sound.

I use the following soundfont files, in this order, into the "Synthesizer" (BTW... I wonder why to call it a "Synthesizer" if it doesn't synthesize any??? It just plays the sounds from the soundfont files, so... it is just a SoundFonts player):

GeneralUser GS MuseScore v1.44.sf2
FluidR3Mono_GM.sf3
TimGM6mb.sf2

This issue is only present with the GeneralUser GS MuseScore v1.44.sf2 soundfonts file.

How could I fix it (if I could)???

Blessings & Greetings from Chile!!!!!!!

Juan