Microsoft has changed the inking in OneNote for iOS. First they changed ink colors and I now cannot use the blue I had been using. When I select More Ink Colors, select a color and select apply, the color does not stick, instead it defaults to black!
Another problem I am having is with ink thickness. I am pretty sure the medium thickness is thicker than I have been using, while the next level down seems too think. I've been used to the ink looking like writing with a marker, but if it is too thick letters get blurred together and can become hard to read.