Lovense connect causing server to send malformed device added messages

[qdot]

User reports seeing the following error:

Error serializing message: "[{"Error":{"ErrorCode":3,"ErrorMessage":"{"ButtplugMessageError":
{"MessageSerializationError":{"JsonSerializerError":"[{\"DeviceAdded\":{\"DeviceIndex\":0,\"DeviceMessages\":
{\"VibrateCmd\":{\"FeatureCount\":1},\"single_motor_vibrate_cmd\":{},\"stop_device_cmd\":{}},
\"DeviceName\":\"Lovense Hush\",\"Id\":0}}] is not valid under any of the schemas listed in the 'anyOf'
keyword"}}}","Id":0}}]"

[qdot]

This looks like a malformed Version 2 DeviceInfo, but... the user reports seeing this with OSCGB, which uses Spec v3?