I somehow got a random artifact in my archive. It will be different every time you load this savegame .The map is called "The Spire", it's from workshop.
Related to this bug.
I'm pretty confident this is working as intended. Map Makers are able to assign a random weighting quality to an artefact so it will appear differently when researched, this is only rolled when the artefact is actually researched so if they apply a 1-1 weighting between 2 artefacts there's a 50:50 chance of receiving one of either type.
Just to confirm is the Artefact in question sitting in your archive un-researched before the save and thus completes after the save each time? I can't review the savegame at this time as we're not in the office until the new year.
All articfacts in my archive are reseached. One of them is different every time I reload.