Colorcomposition map thumbnail size is sensor-related

[ghost]

Describe the bug
When I request colorcomposition maps on a single field (out of 4), the thumbnails are not all the same size. They depend on sensor type.

To Reproduce

1. Load the attached zipped layer into QGIS (EU platform)
2. Select field called 'mafalda' or 'pocahontas'
3. Tick the 'Selected features only' box
4. Choose COLORCOMPOSITION
5. ALL SENSORS
6. 2019-04-01 to today

Expected behavior
All the thumbnails should be the same height/width, no matter the sensor and no matter the field size/shape.

Screenshots

Let me know if you have questions.

[ghost]

@myarjunar I didn't find anything similar in the existing issues. That's why I created this one. I hope it's not a duplicate.

[vincentlel]

This is not a blocking issue and this might be related image native resolution as L8 Enhanced is at 15 m and S2 at 10 m. There is not resampling at 5 m on this map type. This minor issue can be classified as enhancement.