DHTMLX 5.0 Toolbar touch issue in IOS

my web app - dhtmlx toolbar have buttons that creates a popup on click. buttons work fine on desktop browser but the touch on toolbar doesn’t work in IOS safari especially when using iphone. please help.

Unfortunaetly the problem cannot be reconstruncted locally.
The online samples seems to work correctly on iOs in safari:
https://dhtmlx.com/docs/products/dhtmlxToolbar/samples/06_item_button/
if the porblem still occurs for you could you please, provide a complete demo or a demo link, where the porblem could be reconstructed locally.