Ghost landing sites?

[Mahler]

Sometimes shooting down ufos increases the landing site count even though there is none to be seen. You only see the ufo and the crash site. What is causing this? Makes me think I've missed a mission somewhere. Easy to reproduce: start new save, shoot down first ufo then wait for your first landed ufo. Occasionally the landing site count is 2 instead of 1. Playing openxcom on the latest nigthly.

[Meridian]

Easy to reproduce: start new save, shoot down first ufo then wait for your first landed ufo.

I cannot reproduce.

Occasionally the landing site count is 2 instead of 1.

How often is occasionally? I tried 12 times.