Adding "Allegro" at the beginning makes the bass semiquavers sound dotted

Here's how to reproduce the issue:

1) Create a project with a Grand Staff a 4/4 time signature
2) In the bass, add only staccato semiquavers, one after another with no breaks between.
3) Put a tempo text (the one called "Swing" in the text tab) at the beginning, and write in "Allegro"
4) Play and see how the left hand is ducked

The workaround is to simply delete the text, but I need it!