FR24 records Blue Air's 734 YR-BAU on a short after the event positioning across the island from Palermo to Catania on 4th January. A bit of sleuthing and disregard of the actual FR24 headline data finds your likely subject flight here:
https://www.flightradar24.com/data/a...r-bau#1006b259 which had come from Bacau, Romania with intent to land at Catania.
FR24 recorded data does indeed seem to show a sudden drop in groundspeed and altitude at around 1200 feet on an otherwise fairly normal looking approach(?) to CTA on over the sea, and a missed approach and short divert to Palermo seems to have been the natural solution to whatever caused bottoms to twitch.