Booked a flight for January IST-ZRH. On the Turkish website, the Air Canada website (who I booked through), and my confirmation, it shows as an A321neo. However, when selecting a seat either through the Turkish app or a dummy booking on their site, the plane matches the 738/739 seatmap on AeroLopa (16F vs 20, 2 exit window rows vs exit door, last row is 27 with only DEF to the row). ExpertFlyer shows it as 79B, which I believe matches the 739.

Is this something that regularly happens when a plane change just occurred, and can I expect the plane to be updated to one or the other in the near future (e.g. one server updated but the other one hasn't yet), or is this a more widespread glitch?