We’re looking into another report that seems to be the same as this case. Is it possible that you share the document link (and activate Support Access) to our support email so we can take a closer look? productsupport@sketch.com
Interestingly I noticed the opposite thing by stumbling across a problem with the mac app. The webapp prototype player manages hotspots exactly as they are, the mac app switches between clickable areas and non-clickable areas, although the hotspot is applied on the whole element.