iOS: Can't hit breakpoint inside C++ on iOS device

Steps to reproduce:

• create Qt Widgets Application / Qt Quick Application from template or open a similar project
• set breakpoint(s) in cpp files that can be hit somehow
• start debugging
• trigger an action that should hit a breakpoint

Current result:

• breakpoint is not hit

Note: using simulator this works fine
Note: hitting a breakpoint inside QML when using mixed debugging works fine