A change stream can forget its implicit session between the initial "aggregate" and subsequent "getMore" commands.
- related to
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                    PHPC-1152 Aggregate may fail to use the same session for getMore commands -         
- Closed
 
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- 
                    PHPLIB-342 Change streams should use the same session when resuming -         
- Closed
 
-         
- 
                    PHPC-1161 Free reference to Session once Cursor is exhausted -         
- Closed
 
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