Progress Bar Bind doesn't call SetPercent

[Yatima1460]

1. Create blank project
2. Create a new widget and add it to viewport
3. The widget should contain only a progress bar
4. Set the progress bar percent to 1.0
5. Add this bind for the progress bar percent:

Expected behavior:
the value should slowly decrease to 0 and the print should be: 0.9, 0.81, 0.729 and so on

Actual behavior:
the progress bar gets stuck at 0.9 and the print always prints: 0.9,0.9,0.9,0.9 and so on

Is this a design choice because the bind doesn’t actually call SetPercent and directly changes the widget or is it a bug?