Multiple instance of swarm

Hi,

I have a problem, Swarm is not closing, and I always have the ‘Lighting needs to be rebuilt’ message in my scene, even after building it.

Every building of lights opens up another instance of swarm.

Any idea where this can come from?

Thanks

111349-capture4.png

I’ve tried it on the computer of a coworker, and everythings works fine, I have no clue where this can come from