hi rohit, thanks for your reply!
i did try to disable all plugins – that did not change the problem.
but i found what caused the “random” problem:
the burger menu is enabled in “himalayas.js” inside a
jQuery( document ).ready( function () {
there is the code: at line #87
//menu toggle
jQuery( window ).on( 'load', function () {
that loads loads the click/toggle action. when i move the menu-toggle “window” >load function outside of the document ready block, it works. i guess there’s a timing problem that the window>load gets enabled when the document ready is fire is to late sometimes and the burger menu is not enable…i moved the window load outside of documetn ready and the problem is solved:) maybe that helps.
cheers, bernhard