Iphone/ipad crash assertion

Development Platform & Builds Mobile
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1

Currently my AR app crashes within a few minutes of starting in an iphoneSE 12.3.1 and in an iPad (7th generation).
The app has almost nothing, and no sounds, but the error says the following.



error symptomsd Can't get most elevated app state from dictionary { BKSApplicationStateExtensionKey = 0;
SBApplicationStateDisplayIDKey = "com.test.ue4";
SBApplicationStateKey = 0;
SBApplicationStateProcessIDKey = 20382;
SBApplicationStateRunningReasonsKey = (
  [INDENT=2]{[/INDENT]
  [INDENT=3]SBApplicationStateRunningReasonAssertionIdentifierKey = Resume;
SBApplicationStateRunningReasonAssertionReasonKey = 10000;[/INDENT]
  [INDENT=2]},
{[/INDENT]
  [INDENT=3]SBApplicationStateRunningReasonAssertionIdentifierKey = "MediaExperience.20382.\"com.test.ue4\".\"AmbientSound\".isPlayingProcessAssertion";
SBApplicationStateRunningReasonAssertionReasonKey = 1;[/INDENT]
  [INDENT=2]}[/INDENT]
  );
  }

The crash log says that one of the Threads breaks in the same section: CoreMotion

I have no idea where it comes from, as it is an AR app without sounds.

Any tips?

Greetings.