I got a openning quest with sigil to examine, unfortunately one was not on a wall but floating in the air, so it was not possible to examine to switch it from red to blue...I even tried to construct something to put it on a surface not to avail...
Hey there,
Thank you for bringing this issue to our attention. If at all possible, please press F2 while next to the glyph and attach a screenshot of the overlay menu to this post so we can better understand what maybe causing the issue.
Thank you!