I also tried using a clean profile and reinstalling the browser - didn't help. Checked on another PC - same issue occurs.

I have a problem with Opera that appeared recently (might be linked with Win10 Creators Update). Whenever I launch a video on Facebook (I'm talking about FB native videos, not youtube), it starts to play correctly. But whenever I try to fast forward or rewind it by moving the slider, the video pauses and cannot be played again. Moving the slider refreshes the displayed video frame, but doesn't start the playback. I can watch the entire video just fine as long as I don't try to fast forward or rewind. If I do, there's no way to continue the playback. Issue occurs only on Opera, videos are working fine on Chrome.

I tried:
-updating flash player
-disabling Opera extensions
-disabling Opera's ad blocker
-launching Opera in private mode
-clearing cache, cookies
-using both HD and normal videos on FB
-using other browsers (FB videos work fine in Chrome for me)

STEPS TO REPRODUCE:

1. Launch Opera
2. Go to Facebook
3. Play any native FB video
4. Try to fast forward it or rewind by moving the slider
5. Notice the video will pause and it won't be possible to watch it anymore

Actual result: FB native videos are getting paused and cannot be watched after trying to rewind or fast forward them.
Expected result: User should be able to fast forward or rewind FB native videos without any issues.

OS: Windows 10 64 bit, Creators Update
URL: Facebook.com
Version of Opera: 45.0.2552.881 (PGO)