I just recently got a Fire TV Stick Gen 2 and so far Kodi 17 has been working great.
Though there is one small issue I can’t seem to fix.
When playing some 1080p h264 FLVs and I hit rewind or seek far back, when it goes back, it will pause the video for at least 5 to at most 30 seconds and then finally play from that spot.
I don’t notice this behavior on my Win 10 Kodi 17.
Oddly if I open SPMC/Kodi 16 and watch the exact same video, it rewinds/seeks completely normal, just giving a maybe 2 second delay (roughly the same as Win 10 for Kodi 17) in playing the video again.