Bug or function change of the blocks after the update

Before the update my app was working fine. The blocks in mind are.

I changed these blocks and the app started working again

The way I see it is that from variables “APP” and the command “OPEN” from the screen block do not function or the way they work has been changed. If there have been any changes in the function of the blocks would you mind sharing them since with such change the structure of my app is completely changed and if is a bug could you fix it.

PS. The platform works faster than before but there are still moments in witch changes are not being saved but can be seen in the structure of the app ( its hard to explain it but I have seen other people complain of it)