I've started week ng them as well.
Different zones. No apparent reason. Cannot interact with them and other don't seem to see them.
I thought I was halucinating.
I just assumed it was a sign that I was letting my ESO addiction get the better of me, and it might be time to slow.down...but then I someone asked me to help.with a dungeon and...then another...and I just need to do.my writs...and...and...***.
I've seen this several times a few weeks ago, but not recently. I was in Eastmarch, I believe. Thought aliens or something, but then I thought it looked like armor, so I went and stood right inside it and it fit just like armor would. Crazy looking thing, kinda spooky.