Question / Help My long stream(1 hour) crashed into short parts(2-3 minutes).

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My long stream(1 hour) in Twitch or Mixer save crashed into short parts(2-3 minutes). Between these shorts parts of the stream we have large gaps in the stream. What it is? My configuration : Ryzen 5 2600, AMD RX 580 8 gb, ram 8gb.
https://obsproject.com/logs/-355k6mI4VrqrIP9