Black line (background?) under video on IE11

Hi. The plugin works like a charm, I’m testing it with a Vimeo Plus video. But on Explorer there is a sort of black line under the video that doesn’t appear on Chrome. It may depends on some div’s background like .player .video-wrapper (on Vimeo iframe) but it only happens on IE. Any suggestion on how to try to remove it? Thanks.

https://www.ads-software.com/plugins/advanced-responsive-video-embedder/