I have 3 apps set to "Launch on startup": Mail, Messages, and Skype. All 3 of them have "Hide" on in "Login Items". Skype and Mail ignores "Hide" attribute and every time i log in the windows pop up. Is there any way to prevent Mail and Skype from opening windows when i log in? Browsing online says to mark "Hide" option, but the option is already marked for both applications. Messages.App works as intended, starts nicely in the background.
I also followed this article: https://discussions.apple.com/thread/6727254
Deleted "~/Library/Containers/com.apple.mail/Data/Library/Saved Application State/" manually, however, this worked for one startup, and started messing up later.