Modern Player - Resume course cutting slide

Hi everyone,
I've noticed that when I use a course published with SL360 with the modern player and I use the resume function, the resumed slide appears cut on the right.

If I click on the menu icon to hide the menu and click again to show it, the slide resizes correctly and all the content is shown properly.

It happens on firefox and chrome, both when launching a course from C:/, both when the course is uploaded in our LMS, opening both in same and new window.

Any idea?

Thanks,

Tania