Sorry about this! I’ve heard of this bug happening 2 or 3 times now, I can’t work out exactly what’s causing it. Reloading triggers a fix I put in but I could probably also move that fix to also apply when trying to use the lift if you have the Ivory Blessing, there should be no way to get the blessing without also getting the stamp and yet it seems to sometimes happen.
I’m glad you’re enjoying the game and I can only apologise for that mishap, I’m hoping I can get a proper fix uploaded as part of the update later on this year!