Using ExB DevEd 1.17. Popup in mobile view is blocked by other elements on page (a button and a Search widget).

When I set ".esri-popup__main-container{top: 50px} " in style.scss, the setting holds true on a desktop browser but seems to get overwritten in mobile view {top: 0px}. The problem is browser-agnostic.
Also tried these settings but same issue:
.esri-view-width-sxmall{top: 50px!important;}
.esri--popup--is-docked-top-center{top: 50px!important;}
Also tried z-index: 1000 on all of above. No changes.
You can see for yourself here (but don't use Developer Mode from a desktop browser because the issue doesn't occur - only on a true mobile device). Property Viewer (ExB117)
Thanks in advance for any possible solutions.