Substack|Substack has created a new and interesting UI|UI bug|bug. When you click into an article, it first appears in this hall|hall of mirrors|mirrors:
and then when you click on either one of the titles, it resolves to the usual single-stack setup. Sometimes a UI bug is peculiar to Firefox, but this one appears in both Firefox and Edge.
A few hours later, they fixed it. At least it was an original bug, not seen before.
Polistra's Mill 