Cryptomatte Metadata Missing in 2.8

sorry 4 my English if any situation)
In finish we have:

  1. Out files with compositor is dont work. But it will correct work if we make out in scene-output. I just need ON crypto in passes and set settings out multiOpenEXR? Thats all, I can rendering sequence?
  2. I find fix. Totally cant understand, what need to di with it… https://developer.blender.org/rB1bbe770
  3. Using 2/79 latest. Dint understand too, how…
  4. Compositor in 281 isnt working in all ways.
    May someone explain one working way step by step?
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