Maintenance for the week of August 31:
• [COMPLETE] ESO Store and Account System for maintenance – September 3, 10:00AM EDT (14:00 UTC) - 12:00PM EDT (16:00 UTC)
I don't know what causes this, but you may want to fix it. I want to stress that I only jumped in to check if it was a visual bug. I did not engage in any fights and jumped out after taking the screenshots.