In Gunner98's "Borscht on Bornholm" scenario, there is a Lua action to change the units in Ronne Port from the NATO side to the Captured side when one of the player's units remains in the port for a certain amount of time.
The action triggers properly, but, after the action is complete, the units in the port appear to be duplicated. Each unit is shown twice, superimposed on each other.



Looking with God's Eye or in the OOB shows that there really is only one of each unit, even though the player sees two.
Test scenario attached. Zoom in on Ronne and press play and the PT-76 should move in to trigger the event.