In other words, I generate three separate applications from same sources so that all can be installed in a device at the same time. Therefore the content of plist files are identical, except CFBundleIconFile and CFBundleIdentifier.
When looking at Info.plist in XCode I can see "Application does not run in backgr" with a checkbox, while the two other plist files show UIApplicationExitsOnSuspend. Open all three files as source code or text and they contain exactly the same code:
<key>UIApplicationExitsOnSuspend</key>Weird... still everything seems to work ok. Just a note. Btw official documentation is available here.