When drawing the bounding box for a given object using
prodigy image.manual, if the object rectangle is really close to margin, the cursor may fall outside the area of the image. As soon as the cursor falls outside the image, the bouding box doesn't change anymore with cursor movements (unless the cursor is brought back "inside" the image)
Expected/desirable behavior IMHO: cursor movements should still be influencing the rectangle being drawn, even when the cursor is dragged outside the image. In that case the bounding box should extend so to reach the boundary of the image.
The problem is a bit hard to describe in words, but to reproduce, just try to draw a bounding box with boundaries close to the edge of the image to be annotated, and the hiccup above should bother you, especially if you try to draw it with fast cursor movements, and accidentally bring the cursor outside the image
As a minor UI improvement, drawing a countour around the image could help with annotations, so to better detect the image boundaries (working with white backgrounds is a pain otherwise).
I using prodigy 1.8.3 on Windows and Firefox, glad to provide more info.