i have added a crash report in the next comment.

Thanks a lot for the detailed answer! How frequent is this crash? It occurs to a small amout of users (approx. 300 crashes for the last year shown in the organizer) and we have not received any feedback through our support about customers complaining about a crash happening all the time when they start the app. However it is still not the best customer experience and we would like to prevent the crash. Are you seeing other 0x8BADF00D crash reports with different backtraces? No that is the only crash with 0x8BADF00D. We want to try executing supportCellularPlan on a different queue, so that the app does not crash when CT takes longer for the synchronous code. What do you think about this approach?