At the beginning of this year we noticed that the Deepin Desktop as it is currently packaged in openSUSE relies on a packaging policy violation to bypass SUSE security team review restrictions. With a long history of code reviews for Deepin components dating back to 2017, this marks a turning point for us that leads to the removal of the Deepin Desktop from openSUSE for the time being.
It seems to me that the offending dialog would only be triggered if you did a full fresh install. During the previous iteration of the testing, they probably had a VM somewhere with it installed; since the underlying packages were already present, the dialog would never have popped up.