Concurrent modification in JSON parser

The code is looping and modifying the contents in loop. Attached input on which ProfileFetcherUtils.fetchFromJsonObject fails

Caused by: java.util.ConcurrentModificationException
    at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:901) ~[?:1.8.0_131]
    at java.util.ArrayList$Itr.next(ArrayList.java:851) ~[?:1.8.0_131]
    at pl.edu.icm.unity.oauth.client.profile.ProfileFetcherUtils.resolveNestedJsonType(ProfileFetcherUtils.java:65) ~[classes/:?]
    at pl.edu.icm.unity.oauth.client.profile.ProfileFetcherUtils.resolveNestedJsonType(ProfileFetcherUtils.java:58) ~[classes/:?]
    at pl.edu.icm.unity.oauth.client.profile.ProfileFetcherUtils.resolveNestedJsonType(ProfileFetcherUtils.java:53) ~[classes/:?]
    at pl.edu.icm.unity.oauth.client.profile.ProfileFetcherUtils.resolveNestedJsonType(ProfileFetcherUtils.java:53) ~[classes/:?]
    at pl.edu.icm.unity.oauth.client.profile.ProfileFetcherUtils.resolveNestedJsonType(ProfileFetcherUtils.java:53) ~[classes/:?]
    at pl.edu.icm.unity.oauth.client.profile.ProfileFetcherUtils.convertToRawAttributes(ProfileFetcherUtils.java:37) ~[classes/:?]
    at pl.edu.icm.unity.oauth.client.profile.ProfileFetcherUtils.fetchFromJsonObject(ProfileFetcherUtils.java:31) ~[classes/:?]
    at pl.edu.icm.unity.oauth.client.profile.OrcidProfileFetcher.fetchProfile(OrcidProfileFetcher.java:67) ~[classes/:?]
    at pl.edu.icm.unity.oauth.client.OAuth2Verificator.getAccessTokenAndProfilePlain(OAuth2Verificator.java:461) ~[classes/:?]
    at pl.edu.icm.unity.oauth.client.OAuth2Verificator.getRemotelyAuthenticatedInput(OAuth2Verificator.java:263) ~[classes/:?]
    ... 96 more