Tempo issue

Hi, gang!!!

You know I work with MuseScore 2.0.2 under Lubuntu 15.04.

Since a while, I've noticed that there is a rare behaviour with tempo changes:

If I add a tempo mark, or I change the tempo value of any existent tempo mark, the real playback tempo doesn't change. The playback tempo remains the same it was before the changes.

It doesn't follow the new tempo mark indicators up... I save and I re-load the file I'm working on.

I think it is not normal. Or... Is it? ???

Is it a known bug? ???

How can I fix it? ???

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

Juan