You only have to go back through this forum to pickup on the completely random scheduling that Vueling does. It's what I use to look at how things happened in the past 🙂
For example, they released Dec 24 & Jan 25 flights to Malaga in Mid October 2024, just 2 months before.
I wouldn't be surprised if they operated Alicante during that same period as well. I just find it bizarre that they often take flights off sale then re-release them, or just release them late. It creates so much confusion and uncertainty if you've booked with them.