If you don't research them from level 1 up to the last level , it will tell you, you don't have that tech researched !!!!

Same as with strategic resources !

You have to research them in the proper order or the techs will bug out ..... WTF

So the whole damn TECHTREE is one large BUG :-)

They forgot to lock the items, which need a prerequisite 

and when you research it , the game don't unlock the things, as it checks somewhere else if you should get that ... 

and because you don't have the prerequisite tech, it didn't unlock the item and the whole game is destroyed.

Could happen to  Airplanes, Command Points, Strategic Resources ... 

Researched AIRPLANEs , as it was in the wrong order , game still thinks not researched ...

https://www.dropbox.com/s/vf827jpl4logw4h/Alex_%20Airplanes.zip?dl=0

Hello :)

Mhh it's odd, I've been trying to reproduce the issue as you described on a local version and I everything works just fine...

Maybe we've already fixed it and it's coming in the next patch!

I'll keep an eye on it though!

I'm playing on the release build, so there's probably stuff that's already been changed.

Two important bugs came up in my last game:

After gaining a curiosity power technology from an event, curiosities bugged out: technological advancement didn't reveal new luxury curiosities, I was locked at 'expedition power 2' when I should've been at 3, and Orichalcix/Quadrinix strategic resources appeared as 'expedition power 1' curiosities. Researching the final technology that sets expedition power to 4 resolved some of these issues, but I think that the last stage of luxury resources was forever blocked from discovery.

Researching the military technology that grants +2 CP per hull type had no effect on fleet CP. I stayed at my previous total (which was 7). I haven't researched any more CP techs yet, but will update this to say whether the tech starts working again.