Zoom-to-Fit Not Working After Import of MIDI Files

Hi,

After importing a directory of MIDI files into a Library window (80 files) I observe that the zoom-to-fit operation  (arrows-X icon) does not work correctly.

For example, a file which is 145m long shows only 27m after zoom-to-fit  (instead of showing the full 145m).   

I don't know if this is actually related to importing or not.  This just happens to be the context in which I observe it this morning.

Here is a link to a short video which demonstrates: 

(Synfire Pro 2.3.7b6)