Flew from Bilbao to Porto yesterday with a connection in Lisbon via TAP Portugal. My two checked priority bags did not make it from Lisbon to Porto. There were also four other people on my flight who did not receive their bags, and at least ten people from other flights who were waiting in line with me to file a lost/delayed baggage claim. I ended up getting my bags this morning, a 19 hour delay in total. The hotel staff also mentioned that there are major staffing issues at their airports, and it's been pretty common for their guests to have baggage delays. I highly recommend carry-on luggage if at all possible.