Cannot select label when labelling images anymore

It's no longer possible to select or modify labels when labelling images in Google's AutoML (we haven't migrated to Vertex AI). I have setup a new Object-Detection dataset for this example, containing one image and two labels: 'door' and 'window':

When I enter the labelling view, I can draw bounding boxes, but once drawn, it's no longer possible to change the label or remove the bounding box again. Neither element is clickable:

The problem is not contained to this google-cloud project, we have tried different ones. We tried different browsers (Latest chrome and firefox) and also reset the browser cache in both browsers. As mentioned, I also already tried setting up a brand new dataset.

Any hints on how to fix this?

It looks like Google is pushing their followup-product "Vertex AI" over AutoML Vision.

Even though AutoML is not officially cancelled, once we migrated the datasets to the new Vertex AI platform (as decribed by Google Documentation), labelling was possible again, with a only slightly changed UI.