Problem Statement/Rationale

On an Aggregate, I have a simple $lookup that pulls an array of object, on the next pipeline I use a $project with a syntax that works perfectly fine with $set or $addField, so I'm not sure what's going on.

I also launched the aggregate on the shell to see if it comes from Compass, but it also gives me an empty result.

Steps to Reproduce

It works perfectly fine on other collections, so I'm not sure I can reproduce it.

Expected Results

The same result as I get on $set pipeline

Actual Results

Not the same result as I get on $set pipeline

Additional Notes

I use MongoDB 5.0.6 Enterprise