Problem Statement/Rationale

Aggregations that are clearly using an index are flagged as no index used

Please be sure to attach relevant logs with any sensitive data redacted.
How to retrieve logs for: Compass; Shell

Steps to Reproduce

Add an index to collection, run match followed by count stages?

Expected Results

Query performance summary correctly shows which index was used

Actual Results

"No index available for this query"

Additional Notes

Particularly bad looking since "No index..." is right below something that says XXX index keys examined.