Animation of the fabric stops and "freezes" earlier than I need to Animation of the fabric (object with cloth  modifier) stops and "freezes" earlier than I need to. 

Why is this happening and how to fix it? 

On the timeline is correct range, 1-300, in cash 1-300 too, but animation of the fabric ends at 84 frame. If I Bake animation, it also ends at 84 frame.
Problem solved! :) looks like it is just a bug. Apparently it happened not only to me. To solve it you need to enter and then exit  the Edit Mode and Bake again.