Mobile Menu Icons not appearing on mobiles

Hi there there is a collison between the theme and a standard wpbakery element.
if i use the element the menu icon ,in android chrome browser is not appearing, in mobile firefox browse appears a greybox. Desktop Browsers are not effected.

The Element is the Button Element from wpbakery and only if you select “font awesome 5” icons, if you select “Open Iconic” or another the menu works.

Is there a solution…work around ?

Kind regards
Volker

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