Just a general note on baggage tracking, the actual tracking of bags by ground handlers into airport systems (if any) and then onto airlines varies a great deal.

IATA resolution 753 is due to come into force on 1st June 2018, which mandates tracking of bags at 4 key points:

1. Passenger handover to airline
2. Loading on aircraft
3. Deliver to transfer area
4. Return to passenger

and additional optional tracking points where practical.

Hopefully the resolution will improve bag tracking, however I know of at least one airport that won't have this in place by the due date.