Unable to select task to close duplicates

Reproduction Instructions

Go to any Maniphest task, Edit Related Objects -> Merge Duplicates In and try to select any task.
The window is simply closed without performing a desired action.

From quick bisecting it appears this issue was introduced by dcf3ca8e045.

In case it’s browser-related, i was testing this with current version of Chrome.

Phabricator/Arcanist Version

phabricator: 5d8ee504d645ba1a6d69c23b9cbad557e14b03ad (Wed, Jun 19)
arcanist: 7329bc7c32b995a7dce0319723857cbdf4f95a91 (Thu, May 23)
phutil: ada64585035e8fbdf5d0dd6abfb6c13e6b160b7d (Mon, Jun 17)

Thanks! This was almost certainly caused by https://secure.phabricator.com/D20573.

This should be fixed by https://secure.phabricator.com/D20590.