[Campaign creation][Merge] It's possible to open multiple survivorship rule drop downs at the same time

Access TDS as a CO Create a merge campaign In the "Model" section, click a survivorship rule dropdown for an attribute Straight after, click another survivorship rule dropdown => KO: First survivorship rule dropdown must be closed and only the second one must be displayed. Also, the dropdown can be overlapped if I click on the second survivorship and next on the first survivorship,