BUG: invisible slavers

Very often when I enter the flesh market from the direction of the aasimar house, all NPC on the map become invisible and I cannot interact with them.

Loading the game or entering another area solves the problem.

for me its not that, i press tab and notice their names are under the floor, so they have sunk under the map, but same solution

Then we have the same problem.
I can see the names when pressing tab but I cannot see the NPC, so I called them invisible.
Maybe they are under the floor.

This bug has already been discussed. It slows down the gameplay, but is not critical. Therefore, they will not fix it quickly.