thanks for the reply.
You can reproduce the bug directly with your Kendo UI Hybrid Mobile Demos. Please follow the exact steps.
1.) Run Internet Explorer 11
2.) Go to your demo page with the drawer: https://demos.telerik.com/kendo-ui/m/index#mobile-drawer/index
3.) Now if you click the drawer, everything works fine, cause we are in desktop mode of IE 11.
4.) Press F12 in the browser (Dev Toolbar opens), click on "Emulation" Tab and switch "User Agent String" to "Apple Safari (iPad)".
5.) Now the page automatically refreshes and is rendered in Mobile Mode (instead of Desktop Mode).
6.) Now if you click on the Drawer Icon, nothing happens -> The drawer Menu is broken in IE 11 (Mobile Mode)
As I reported earlier, it worked for example in version 2018.1.221. You just need to replace the latest Kendo "kendo.all.min.js" with the one from Version 2018.1.221 and the drawer is working again, of course than you have other bugs.
I know that IE 11 is no longer updated, but our client still used it for testing the mobile parts with the Emulation described.