Alger,
I’m using the Travelify theme with Woocommerce. The dropdown list for state will not collapse in the Account and Checkout page using IE11 browser. I have not added any custom css to these divs “select2-drop”, “select2-drop-mask”. It works fine in Firefox, Chrome and Opera. Any ideas to fix this. My site is still on localhost so I cannot point you to it for viewing.
This is WooCommerce related issue and here you can read more about it. Hopefully, it will be fixed in the next WooCommerce upgrade. Meanwhile you can apply temporary fix just like mentioned in thread that I mentioned above.
Thank you for reporting it!