Hi,
this is a low priority logical error in my opinion:
After finishing the first ground mission and before your chinook returned to base you can research "Alenium".
But without having Alenium at the base, it shouldn't be possible to research it.
To fix this, research of new alien technology should only be possible, when the chinook - which transports the scientific relevant cargo to allow the research of new alien technology - arrived at its homebase or another base.
Another point about research conditions: If one of your base has Alenium, but another base has none, should that other base be able to research Alenium? Maybe at a slower speed. Maybe you have to send a bit of Alenium to that other base before research can start.
Best regards
Robert