Observed similar issue on BQ E4.5., r25 (after OTA6 update).
Dialer locked UI.
Happened after dialing back via activation of dialer from missed call notification (without unlocking the phone). Dialer remains on the foreground and phone UI seems to be stuck. At the same time, icons in the notification area are being updated (clock, battery, network status), but there seem to be no way to access notification area or unlock the phone.
Observed similar issue on BQ E4.5., r25 (after OTA6 update).
Dialer locked UI.
Happened after dialing back via activation of dialer from missed call notification (without unlocking the phone). Dialer remains on the foreground and phone UI seems to be stuck. At the same time, icons in the notification area are being updated (clock, battery, network status), but there seem to be no way to access notification area or unlock the phone.