Unexpected return to the default preset... ( FIXED !)

A strange phenomenon I hadn't noticed before.

In the standalone version, if I select a preset and then I drag a MIDI file to play it, as soon as I start playback, the preset reverts to the default preset. If I change the preset during playback, it works, but as soon as I rewind to the beginning, the preset reverts to the default preset again. 
Have you noticed the same thing? Is this a bug?

I should note that the MIDI file is from Eldoraudio and not a pianoteq file.

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Sorry! I figured out the problem—the MIDI file is sending a “program change 1” command at the beginning. And “program change 1” is assigned to the default preset in my "Global MIDI mapping".