autoplayAfterSeek has no effect

I have a scene with a video player, which all works fine. 

However, when I click the forward or rewind buttons on the remote, the playback does not resume after seeking until I click the play button again. 

I have 

 autoplayAfterSeek="true"

set on the Video node. 

Anyone have any ideas what I might be missing? 

This is happening with both HLS and MPEG videos.

Using a Roku stick on version 14.1 

Thanks.