In low passage map you cannot select a room

I cannot add a new low passage area. It keep saying select a room. I cannot select a room ...so it will not be safed. It looks like a bug. It keeps asking select a room.... after you choose low passage map...the new added zone will not be saved....i can only cancel to get out

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Hello,

If the map overlaps, low-height areas may not be added. Sometimes, there's a bug that prevents low-height areas from being added. We recommend creating a new map to see if you can successfully add low-height areas.