UI Sliders stop working after a certain Width x Height when the canvas is set to Scale With Screen Size

Problem

I have sliders that work well when their canvas is set to Constant pixel size. When I set the canvas to scale with screen size the sliders stop sliding (they still get grayed out when clicked) when the screensize gets too big.

Examples of resolutions that work, if I make it one pixel bigger it stops working:

1666x948

1665x949

1664x950

1663x950

1662x951

1661x951

1660x952

Things I have tried:

• Removing everything that could possibly block the sliders.

• Moving the slider directly under the canvas as first child.

• Setting canvas to constant pixel and constant physics.

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I am utterly confused and any help would be dearly appreciated.

Thanks, wop4