When videosphere source changed dynamically, black flashes appear

Description:
When videosphere source changed dynamically using JS, black flashes appear when the source is changed or when currentTime is set for all sources except for the source that originally belonged to the videosource.

  <a-videosphere id="videosphere" src="#scene1" autoplay rotation="0 180 0"></a-videosphere>

    </a-entity>
</a-scene>

var videosphere = document.querySelector('#videosphere');
var video = document.querySelector(videosphere.getAttribute('src'));
video.currentTime = video.currentTime + 3; // will not have a black flash

videosphere.setAttribute('src', '#scene2');
var video = document.querySelector(videosphere.getAttribute('src'));
video.currentTime = video.currentTime + 3; // WILL have a black flash

videosphere.setAttribute('src', '#scene1');
var video = document.querySelector(videosphere.getAttribute('src'));
video.currentTime = video.currentTime + 3; // ONCE AGAIN WILL NOT have a black flash

• A-Frame Version: 0.2.0
• Platform/Device: Firefox Nightly 48.0a1

Reproduce the supplied A-Frame example in Firefox Nightly using the videosphere source changes and currentTime updates for scene1 and scene2. Start at the videosphere source-switching behavior; done means changing sources or seeking no longer produces black flashes across the listed videos.