bug on Rebloom theme - please help

There is a very uncomely bug in the Rebloom-Theme (WordPress) that I have pruchased: just on Apple mobile devices (iPhone/iPad … any browser!) the mobile-navigation behaviour in Layout 1 at max-width 800px moves the wrong way. I really have to get that fixed on my costumers project.
For your reply thank you in advance &best regards,


The author of that theme @evalanee have a suggestion but it looks like they no longer offer support for that item.