Great plugin

The plugin does its job very well and is quite simple to configure. There’s just one small bug (my version is 2.2.9): if you click multiple times the link to open the size popup before it opens, the popup appears multiple times (it also happens on the demo page; double-click and scroll down when the popup opens). I’ve currently fixed this on my site by adding this CSS:
.wpcsc-btn-loading {
pointer-events: none;
}