To reproduce:

1. Load any two images
2. Open Image cropper
3. Click "New bounding box"
4. Select any type (eg. ellipsoid) from pop up box
5. Crop one image by clicking "Crop"

( Optional 5.a select the other image in the datamanager )

6. Click "New bounding box"

Actual behaviour:
A new bounding box of the previously selected type is generated.

Expected behaviour:
A new pop up appears for selecting the desired type of bounding box. While this might be arguable on the same image (without 5.a) it definitely should happen after changing images.

This can be circumvented by closing and reopening the image cropper, but should be fixed.