@Marinus-van-Deudekom, we know of course that there are (quite a few) restrictions by Apple and Google, but @Achim-Kaluza complaint about crashes, not about missing features.
@Achim-Kaluza, nevertheless AA/CP are quite complex protocols, many things can go wrong outside of the MRA app. @Rainer-Treichel tip about trying a cable for testing purposes is certainly not a bad one. If you have a tankbag or something, it is quite easy to do. Of crashes do not occur while using a cable, we can rule out the origin of the problem being in the MRA app. Complaining in the forum is not making things better. Did you submit a supportticket already? That could be helpful in solving the issue.