bends

SHEET METAL BEND - CANNOT UNROLL A SIMPLE BEND
I am using sheet metal in OnShape the first time and trying to unroll a simple bend. The arc and line are tangent. Seems like this should be a trivial thing to unroll, but it refuses to do so. Am I missing something?

SHEET METAL BEND - CANNOT UNROLL A SIMPLE BEND
I am using sheet metal in OnShape the first time and trying to unroll a simple bend. The arc and line are tangent. Seems like this should be a trivial thing to unroll, but it refuses to do so. Am I missing something?