Video Playback from Wireless Flash Drive to Android sometimes choppy

Using a Samsung Galaxy Note 2 with Android 4.4.2 and AirStash 3.0.1

(I reboot the phone before using the Wireless Flash Drive)

Sometimes when playing back video from the SanDisk Connect Wireless Flash drive, no matter what player I use, VLC, stock Video Player, ES Media Player or KMPlayer, the video is choppy.  Like maybe 20 frames a second, not 24 or 30 fps.

This doesn’t happen all the time, just sometimes.

Any suggestions would be appreciated.