If you click an empty subtask box in the popout panel twice quickly, the checkmark does not appear.

[Poikilos]

If you click "in-progress" then "complete" too fast, the GUI doesn't respond by changing to a checkmark but the backend responds correctly.

This issue may be related to #3811, #1905, and #3300, or at least a similar fix to the one proposed in the issue body for #3811 may apply.

Actual behaviour

While marking subtasks as complete directly from unchecked, you must click twice slowly (waiting until the in-progress symbol appears before clicking again).

The failure leads to think I have to click a third time, which actually unmarks it as would be the normal behavior though it is not expected since the in-progress gear is showing before the third click.

Expected behaviour

The check should appear as complete whenever you mark it as complete, regardless of how fast you click.

Steps to reproduce

• Add subtasks.
• Double-click a box using the popout panel (It still appears as a in-progress symbol, but on leaving and re-entering the popup, the icon is a check).

Logs

N/A ?

Configuration

• Kanboard version: edf18af (or one before possibly)
• Database type and version: N/A? (and unknown)
• PHP version: 7.3.14-5+
• OS: Fedora 31 (Server: Ubuntu 18.04.1)
• Browser: Firefox 73.0.1