ios - Why is my tableview cell behaving differently when I swipe-delete at different speeds? -

i've uploaded video of behavior here (dropbox link).

when swipe-to-delete cell quickly, uilabel on right side of cell appears move closer right edge of cell. stays there until swipe-to-delete slowly. if slowly, label stays in right spot , never seems move.

the label placed there autolayout constraint (trailing space superview, content view of cell).

this began occur after downloading non-beta release of xcode 6.3 , updating device ios 8.3.

i've tried debugging constraint pre/during/post editing, , label's constraints correct. happening?