Table Widget - Tasks become blank when group is collapsed

One of my boards is behaving oddly on the Table Widget.

I can see only group names + blank lines where the task name should be. If I click on the > to collapse the group, the group name becomes invisible (just a blank line). I can make the group name re-apear by clicking the 3 dots next to the blank line & selecting “expand” (and get all the blank lines for the sub tasks again)

This board is a duplicate of the other boards (we duplicate each month). All the other boards behave normally in the widget. They are all sharable boards. Has anyone had this happen?

Which widget are you using?

The Table Widget