解析GCM事件java.lang.NumberFormatException中的时间戳时出错：s == null

Question

请任何人帮我解决。我使用FCM许多android和ios应用程序。但是现在，一个android和Ios应用在收到的FCM上给出了错误，但没有崩溃。

FirebaseMessaging: Error while parsing timestamp in GCM event
java.lang.NumberFormatException: s == null
    at java.lang.Integer.parseInt(Integer.java:570)
    at java.lang.Integer.parseInt(Integer.java:643)
    at com.google.firebase.messaging.zzd.zzb(Unknown Source:79)
    at com.google.firebase.messaging.zzd.zzc(Unknown Source:26)
    at com.google.firebase.messaging.FirebaseMessagingService.zzh(Unknown Source:353)
    at com.google.firebase.iid.zzg.run(Unknown Source:26)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1162)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:636)
    at com.google.android.gms.common.util.concurrent.zza.run(Unknown Source:7)
    at java.lang.Thread.run(Thread.java:764)