Alas, we cannot do anything about that. An empty changeset means a user has lost their internet connection, or the app was terminated by Android OS, while uploading changes. We don't create changesets if there are no changes. I assume this is a rare occasion, usually the app manages to upload some changes before being terminated.
Here's an example of an empty changeset created by maps.me: https://www.openstreetmap.org/changeset/42578474
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