cvat: Wrong Annotation Per Category using COCO Json

Hello

I finish to annotate a tiny dataset. This dataset has 4 classes. I dump the annotations as a MS-COCO json format.

Using pycocotools I ask to access the annotations related to 1 of the 4 classes. What I got does not correspond to what I ask, In the annotations returned I got annotations that does cover other annotations as well as the one I asked.

I used pycocotools before with different dataset without issues.

----Edit---- I pushed further my investigations… the whole convertion is wrong. I labeled 200 images only, the number of images id is right but the only image that as been converted is the first one and that for each classe.