Occasional crash on startup.

[blurrred]

For awhile now my app would sometimes crash when launching. I was just able to trigger a crash when monitoring adb logcat and got this crash log:
05-24 19:58:24.901 7299 7299 E AndroidRuntime: FATAL EXCEPTION: main 05-24 19:58:24.901 7299 7299 E AndroidRuntime: Process: com.company.app, PID: 7299 05-24 19:58:24.901 7299 7299 E AndroidRuntime: java.lang.IllegalArgumentException: Signal token is not registered for this plugin. 05-24 19:58:24.901 7299 7299 E AndroidRuntime: at org.godotengine.godot.plugin.GodotPlugin.emitSignal(GodotPlugin.java:340) 05-24 19:58:24.901 7299 7299 E AndroidRuntime: at ru.mobilap.firebasecloudmessaging.FirebaseCloudMessaging.access$300(FirebaseCloudMessaging.java:47) 05-24 19:58:24.901 7299 7299 E AndroidRuntime: at ru.mobilap.firebasecloudmessaging.FirebaseCloudMessaging$1.onComplete(FirebaseCloudMessaging.java:70) 05-24 19:58:24.901 7299 7299 E AndroidRuntime: at com.google.android.gms.tasks.zzj.run(Unknown Source:4) 05-24 19:58:24.901 7299 7299 E AndroidRuntime: at android.os.Handler.handleCallback(Handler.java:873) 05-24 19:58:24.901 7299 7299 E AndroidRuntime: at android.os.Handler.dispatchMessage(Handler.java:99) 05-24 19:58:24.901 7299 7299 E AndroidRuntime: at android.os.Looper.loop(Looper.java:214) 05-24 19:58:24.901 7299 7299 E AndroidRuntime: at android.app.ActivityThread.main(ActivityThread.java:7073) 05-24 19:58:24.901 7299 7299 E AndroidRuntime: at java.lang.reflect.Method.invoke(Native Method) 05-24 19:58:24.901 7299 7299 E AndroidRuntime: at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:494) 05-24 19:58:24.901 7299 7299 E AndroidRuntime: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:964)

Any idea what could be causing this?