Some developers notified us that the lifecycle 'instance_add' and 'instance_remove' events do not contain a plug-in instance id that can be matched to the ids that are available in the frontend init token.
We changed that behaviour so that the events now contain the same 'srcId'.
Unfortunately we forgot to update the API documentation here until now. The changes were in effect since COYO version 35.
Please consider the 'instanceId' as deprecated. The id is still contained in the token but will be removed eventually.