Theme unexplainably broke

Development
5

The blur on these elements are missing because it handled with ::before pseudo here:

input[type],
div.ac-wrap,
.popup-menu,
#reply-control.open,
.d-editor-textarea-wrapper {
  background-color: rgba(0, 15, 255, 0.00);
  &::before {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    -webkit-backdrop-filter: blur(2rem);
    backdrop-filter: blur(2rem);      
    z-index: -1;
  }
}

But now it has been removed here. So it removes the blur too. Try remove these three lines.