Did the mini support 3D Touch? That one is actually phased out in hardware by Apple and we have to give it up for shipping because it’s not supported by newer phones.
The other gesture issues we will get to the bottom of when back next week, I am sure it is fixable and apologize about the regression (and the timing of our team break). If anyone else is experiencing this and reading would appreciate if you can chime in with your device / iOS version!