Default [Q]Prevent apps from receiving some system signals like pause or suspend

I try Paranoid Android for a reason: need multitasking so I can open one app that doesn't receive any signal (pause, suspend, etc) while I open another app from a notification when such thing occurs. The problem with any other roms, even aosp with XHaloFloatingWindows is that the first app perceives something and then restarts the data when I go back to it, which I don't want to happen. Is this possible with the Halo or something else?