Vertical sliding menu is not working on Iphone

Hello. Thank you very much for your theme.
I found that vertical sliding menu not work on Iphone
https://prnt.sc/b0pmu2
And client confirm this with real Iphone.
In simulator it is not works.
On real – items of menu have huge font-size – and not have any reaction for pressing.

I read this
https://presscustomizr.com/support-forums/topic/menue-is-not-working-on-ipad/
I disable and delete all plugins at my test website. https://kapitan.mxax.ru/ I try to add recomended code for disable wp-visual-slidebox-builder. But still have not succes.

Can you advice please – what can I do.
Thank you.
BR Maxim