App crashes when calling ADBMobile visitorSyncIdentifiers function

When calling the function

(void) visitorSyncIdentifiers:(NSDictionary *)identifiers;

or

(void) visitorSyncIdentifiers:(nullable NSDictionary *)identifiers authenticationState:(ADBMobileVisitorAuthenticationState)authState;

The app crashes with error

*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[__NSArrayM insertObject:atIndex:]: object cannot be nil'

• Mobile Services SDK
• iOS

In Mobile Services SDK 4.13.4 and below, using special characters in the identifier string causes crash.

This issue has been resolved in Mobile Services SDK 4.13.5 and above. Please update to the latest SDK version.

The method description can be found here: https://marketing.adobe.com/resources/help/en_US/mobile/ios/mc_methods.html