Tomb of annihilation/Tomb of the Nine Gods/ Level 3 Vault of Reflection/ Revolving Crawlways.

The area on this map has no "token" that allows the room to be rotated. The only thing on the Gm layer is the outer edge of the rotating section and not the full circular area..... There is a small section on the Dynamic lighting to help players that are trapped, but I don't understand the reason for the circular "rim" on GM layer?  Please let me know if this is a known issue

EDIT: The "rotating" part is naturally held at the BACK of the Map layer so it isn't obvious as standard