ChoPraTs

Some users are experiencing problems with Penultimate. We have been using different versions of iOS, different iPad devices and Penultimate, but this bug persists after years. The problem is that when we are using Penultimate and sharing screen from iPad to a Mac, switch to another app and then we try to go back to Penultimate, it crashes each time. It's impossible to switch between other apps and Penultimate when the screen sharing is activated on iPad. Has anyone else spotted this problem? How can we contact the developers to ask them if they can solve this? We have tried other apps for notes and they doesn't have this problem, only Penultimate. Thank you!