Remove or hide navigation panel - issues upon recent update

Hi everyone -

Having trouble with my navigation panel after it seems a recent update. I typically have a link using ?chromeless=true to direct my users to a fullscreen version of my report. However, with the new update, the navigation panel at the bottom of my report is not updating correctly and is completely blank upon loading the page. It also now covers part of my report. I'd like to either 1) resolve the nav panel issue to not cover my report and populate correctly, or 2) learn how to hide the navigation pane completely. Example screenshots below.

Any suggestions? Thanks.

- How the nav panel looks when I select F11 or manually choose to show in full screen:

-The blank nav panel that populates now, using my report URL and ?chromeless=true: