fields filter gets applied to elements to include v5.6.0

[mCassanoNsi]

Steps to reproduce

Model A belongsTo ModelB
Model A has properties id, A, B, C, modelBId
Model B has properties id, A, D, E

Make any query without specifying scope: fields for the included models:
{
fields: ['id', 'A', 'modelB'],
include: ['modelB']
}

Current Behavior

result is as follows: [{id, A, modelB: {id, A}}]

Expected Behavior

included models should have all properties: [{id, A, modelB: {id, A, D, E}}]

Additional information

Bug introduced in latest minor version, mongodb.js:1403

[achrinza]

Thanks for opening a bug report, @mCassanoNsi! Seems like you've managed to identify the root cause of the issue; Would you like to submit a PR for review?

[mCassanoNsi]

Hello, I can certainly fix the bug and submit a PR. I wanted to add a non-regression test for this specific case, but I've noticed that all tests about the include parameter are on loopback-datasource-juggler, and none would catch this error. Should I add one anyway to the connector suite?