Too Much For Google TV Streamer and Fire, Works Fine on Roku??!!

I had a really strange experience today.

I added a 2 gig .mov video file to one of my local libraries today; the video stream was HEVC and the audio was AAC LC. The video bit rate was 2k, resolution was 1920 x 1080, the frame rate was 30 and the audio bit rate was 96k stereo.

Every time I tried to play the video in my Fire TV Plex app or my Google TV Streamer Plex app, it would only play for about a minute and then start buffering and I got the message that my "server" couldn't handle that speed and bandwidth.

I then switched to my Roku Plex app -- and it played perfectly fine, no buffering, no interruptions, no nothing.

WTF???