Galaxy S6 :: Does Not Dial / Call On First Try But Only On Second Try

I recently got a Galaxy S6 and noticed that when I swipe to call the phone does nothing on the first try (except for showing the green bar with the words "call"). Sometimes it opens the calling screen for a millisecond but then reverts back to contacts. On the second try however it does connect the call. The same happens when I'm in the phone dialer. I'll type in the number, press dial and then it just goes back to the dial screen as if I didn't type in anything. After typing in the number and pressing dial a second time does the phone actually call the number.

It also sometimes happen that the phone will call (showing calling), but the call never connects. After ending the call and redialing does the call go through and connect.