My issue is this. I had 2 lanterns that I had placed on my island since somewhere like January. So today I decided to move them to a different location. I took them down and tried to place the two somewhere else. Each time, the builder and the building spot that I chose to locate it [the bounding box for the area for construction] disappears; along with the builder that is enroute or building it.

First I thought the issue was because I was placing the lantern too far from a warehouse. So I close the distance, and the builder did start building it. But the next moment, he and the lantern construction box and bounding box had just vanished.

A screen cannot do this issue any justice, therefore; I am not taking any.

I am on Ares.