Many non-local type=Delete activities in db with local=true

Should I worry about the regular occurrence of rows in the activities table which seem to be Delete activities which are marked as local, but which I didn't do? I'm only a single use instance, so I would know. E.g. this one today. It looks like the post was deleted on the remote side. I found nothing of interest in logs around that time. I wasn't doing anything on the site.

Does this mean my instance is forwarding Deletes? Or is it just a glitch in storing the activity? Should I just ignore that kind of thing? I'm on the most recent stable version.

I noticed this when looking into the effect that when deleting remote users using the Admin FE, Delete activities for their posts are stored in that table with local=true as well and presumably sent out. I mentioned this here but found more recent occurrences in the database.