"displayPopupAttribute" isn't working in latest version

When using the "displayPopupAttribute": "showPopup" properly I should be able to show / hide the table pop-up icon for the elements on rows that have a 1 / 0 value.

However, this doesn’t work, no matter if the attribute is numeric / text or if the value is 1, 0 or empty, nothing happens.

This used to work in version 2.4.2 (didn’t test it any of the newer versions)