Since a few weeks now my nexus 4 just "forgets" the passwords of wifi networks I just connected with. This happens when I turn off/on my wifi in the settings or after a reboot. I'm on stock 4.2.2, rooted and i have ~250 wifi networks saved. I already checked the wpa_supplicant.conf file and all 250 networks are correctly inside. In the file there are often copies of the same network and password (only different priority) that appear when I have to re-enter a password again. I tried to delete all unused networks and with ~100 networks saved, there are no problem. Is there any limit on saved networks stored in wpa_supplicant.conf. Only up to ~150 networks are visible in wifi settings.