This issue happens if Mirabel's Mini-Casita was placed in the bottom-left corner of the Sunlit Plateau and the path to it is mostly blocked by trees on the Plateau.
After moving the Mini-Casita from the bottom-left corner of the Sunlit Plateau to another place/Biome, the "Your Sunday Best" Quest proceeds normally.
In the "Your Sunday Best" Quest, WALL·E goes to the corner of the Glade of Trust and gets stuck.
Last Updated: 519d