On my cellphone the navigation button is loading up
Could you take a screenshot?
Have the same issue, when viewing it on iPhone - Safari.. screenshot: https://pasteboard.co/K5udAdF.png
What plugin version do you use?
I can see in the change log that the newest version is:1.11.1 and in this update the bug was fixed (1.10.27), found the way to update the plugin, still have to test it on Safari, but I guess that will fix it