just upgraded to 8.6.4 from 8.6.1
I have timeline with 4 video tracks
on the V1 lays just source clip
on the V2-V4 i have multicamera groups
when i hit play in multicamera mode (nine split) - it plays only nine equal videos from 1-st track
my timeline monitor indicator is on V4
even if i delete or disable V1 - it says "Video track1 not found"
https://www.facebook.com/djfio/videos/1222453497800284/
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everything works fine in 8.6.1-8.6.3 but not in 8.6.4