1.19 pre-release onremovepano and loadscene with onstart attribute

Hi,
I've tried some differents things with 1.19 and the onremovepano event is always called after the onstart attribute of a scene when I call a loadscene action.
Seems odd ?

Not see before but perhaps I was lucky ;)
So what is the best way to enforce an action on exit panorama before the load of the new panorama by loadscene ?