My pet peeve with Netflix is that it occasionally forgets where I last paused my video. I don't often watch Netflix, so when I do, it's annoying that I can't resume from where I left off
After every ad break, the video rewinds to the start of the block before the ad break. So I have to fast forward to the ad break marker.
And people wonder why we pirate :-)
I'm presuming this is because it fires a beacon on pause, but only every X (10?, 30?) seconds on playback.
Not had many issues with it completely forgetting where I am though (it does sometimes get confused as to which episode I watched last though).