Thread safety issue: The _discriminatedTypes field gets modified in the RegisterDiscriminator function, which leads to thread safety problems when the IsTypeDiscriminated function accesses the _discriminatedTypes container concurrently:
---> System.FormatException: An error occurred while deserializing the InputSettingDbs field of class InputSettingDb: An error occurred while deserializing the CombinationActions field of class OneDeviceInputSettingDb: Index was outside the bounds of the array.
 ---> System.FormatException: An error occurred while deserializing the CombinationActions field of class OneDeviceInputSettingDb: Index was outside the bounds of the array.
 ---> System.IndexOutOfRangeException: Index was outside the bounds of the array.
   at System.Collections.Generic.HashSet`1.FindItemIndex(T item)
   at System.Collections.Generic.HashSet`1.Contains(T item)
   at MongoDB.Bson.Serialization.BsonSerializer.IsTypeDiscriminated(Type type)
   at MongoDB.Bson.Serialization.Conventions.StandardDiscriminatorConvention.GetActualType(IBsonReader bsonReader, Type nominalType)
   at MongoDB.Bson.Serialization.BsonClassMapSerializer`1.Deserialize(BsonDeserializationContext context, BsonDeserializationArgs args)
   at MongoDB.Bson.Serialization.IBsonSerializerExtensions.Deserialize[TValue](IBsonSerializer`1 serializer, BsonDeserializationContext context)
   at MongoDB.Bson.Serialization.Serializers.EnumerableSerializerBase`2.Deserialize(BsonDeserializationContext context, BsonDeserializationArgs args)
   at MongoDB.Bson.Serialization.Serializers.SerializerBase`1.MongoDB.Bson.Serialization.IBsonSerializer.Deserialize(BsonDeserializationContext context, BsonDeserializationArgs args)
   at MongoDB.Bson.Serialization.IBsonSerializerExtensions.Deserialize(IBsonSerializer serializer, BsonDeserializationContext context)
   at MongoDB.Bson.Serialization.BsonClassMapSerializer`1.DeserializeMemberValue(BsonDeserializationContext context, BsonMemberMap memberMap)