Issue board due date picker unable to select custom year or month

Trying to set the Due Date on an issue in the sidebar of an Issue board.

When clicking on the month or year in the picker, it shows a select menu to choose a month or year. However, the menu disappears immediately, and the picker closes without selecting anything.

This ability works in other place (such as when opening an issue).

This also happens when editing the due date in the sidebar on a normal issue page.