I noticed that it happens only if the secondary monitor is set to be above the primary monitor. If I go in the Display Settings and make the secondary monitor be next to the primary monitor (like, on the right, for instance), then it works as intended (i.e. the launcher starts on the primary monitor).
Ludovic Chabant
I'm also getting this bug.
I noticed that it happens only if the secondary monitor is set to be above the primary monitor. If I go in the Display Settings and make the secondary monitor be next to the primary monitor (like, on the right, for instance), then it works as intended (i.e. the launcher starts on the primary monitor).