It is a bit strange, yes. But again: This does not solve the problem in general. This would only be a workaround for the very special scenario/problem that you currently have. As soon as there is automation present in a few patterns only, or no automation at all, or you are using interpolated automation, this does not “fix” anything.
Sorry, but the only thing we can do now is trying to add such a “manual send” to one of the next Renoise updates. We won’t be able to change/add this to the Renoise 2.8 release.