Possible bug. One of our custom tools uses Bootstrap, and the modals are not working properly after upgrading to the new UI. We upgraded from 11.12.0 to 11.14.1. Here is a list with the packages updated:
We've set up the navigation on the custom tool as described here. The div containing
@Html.Raw(Html.ApplyPlatformNavigation())adds a class epi-nagivation--fixed-adjust which sets z-index: 1. Bootstrap modals do not work anymore, because the background is placed over the modal as well. Shown as an example of what happens from Bootstrap:
We have a workaround currently making z-index unset.