devtrackers.gg
Hi there! We are currently investigating this issue.
UPDATE: If you speak to Mercy, you should be able to climb the ladder again (although nothing in her dialogue will suggest this as it has not been changed).
EDIT: This should now be fixed, although it might take a couple of seconds the during first time.
Just out of curiosity, Would you be willing to share what caused this to happen?
An optimisation to how server-side game scripts are cached had an off-by-one error (a < rather than <=). It broke two scripts: one related to this ladder, and one that we don't think anyone would ever find, notice, or have any impact before next week's update.
Is it safe to say what the other ladder was now?
Hah sure! It wasn't a ladder - it was a script that despawns the Slagalith when you leave the boss area (but the boss despawns on its own after a while anyway).