Hi @inspire1989,
I think this is the bug you’re seeing. I’ll add your report to that issue.
In the meantime, you can call scene.render immediately after the call to drillPick and it should workaround the bug.
function mouseOverListener(movement) {
// uncomment this line and left-click camera movements work again
viewer.scene.drillPick(movement.endPosition);
viewer.scene.render();
}