I ran the Dev Stable edition (neon-devedition-gitstable-20160713-1047) in a live session and entered the passphrase for my WiFi correctly in Plasma-NM, clicked "connect" and a dialog asking me for the passphrase again showed up. Reproducible: Always Steps to Reproduce: 1. Start live session 2. Open the wifi list in Plasma-NM 3. Select a network 4. Enter the passphrase 5. Click "connect" Actual Results: A dialog asking for the passphrase pops up Expected Results: It connects
seems to be caused by a bug in networkmanager: https://bugzilla.gnome.org/show_bug.cgi?id=793324
*** This bug has been marked as a duplicate of bug 387502 ***