The aircraft returned to Lahore after suffering bird hit, according to news reports. The bird hit damaged an engine of the aircraft.

Source: flightradar24.com

Fly Jinnah (FJ) Airbus A320 (aircraft registration AP-BOQ) engine number 2 (right-side engine) undergoing inspection after landing safely at Lahore Airport. The aircraft is powered by two CFM International CFM56 engines.
September 3, Fly Jinnah (FJ) Lahore to Karachi flight 9P841 was cancelled due to grounding of the aircraft.

Source: lahoreairport.com.pk
On September 4, the aircraft returned to the skies when it left Lahore at 4:32 AM as flight 9P9981 to Karachi. The aircraft remained on the ground at Lahore Airport for 20 hours 14 minutes.
Abbas