Video node continues to fetch MPD file form server when paused.
This functionality is by design. Our system keeps buffering until the video fills up the available buffer space.
The amount of buffering is determined by the available memory and flash space on the device at the time. For example, if you have lots of channels installed, less space is usually available.
Buffering time will vary depending on the size of the segment (i.e. resolution, length of content, etc).