"Round Corners" Widget disappears when selecting multiple objects

The objects in the GIF are all based on simple rectangles, there are no stray anchor points or overlapping anchor points. When I select them individually, I can round the corners, even with smaller groups of shapes I can see the corner widget. But as soon as I select a larger group the widget disappears and I can't round the corners anymore.

I already tried:

- Different zoom factors

- setting the anchor point size to max

- showing corner widget is activated in View aswell

Not sure how to fix this.