The output shows no errors, nothing seems wrong.
Running this playbook in devel, after qt5.yml is run, execution stops. If I reverse the order, it only runs wx_widgets.yml.
Running this playbook in v1.9.3-0.3.rc3 results with both included playbooks being executed properly.
I simulated the execution order with 2 simpler playbooks (simply touching files on the desktop) and they both get executed properly in devel.
So maybe it's something with the modules I'm using in wx_widgets.yml or qt5.yml but they don't have any obvious errors, and whichever one is run first DOES get installed properly with no errors.
The only modules the playbooks use are:
apt_repository, apt_key and apt.
I thought maybe I was including things incorrectly, but then testing it in 1.9.3 showed it worked they way I was trying to nest includes. So I'm confused.