Disappearance of cultural innovations

[Kickass886]

Hi to all.
Tell me is it a bug or WAD?
So: Some cultures have their own little line of innovation. The Italics, Greeks and Barbarians. When I integrate a culture, this line appears, I go through it. And when I take away the rights - it disappears. And when I return the rights back - innovations return to rediscover
This happened to me during the game for Macedonia when I conquered the Italian peninsula.

 

[IsaacCAT]

WAD

 

[Refumee]

A Short list:
Each group has the same Tech, you just need to embrace the suitable culture.

Civic Tech:
Latin group - 9 Tech
Hellenic group - 10 Tech
Barbaric group (britannic, gallic, celto_pannonian_group, belgae_group, germanic) - 1 Tech

Martial Tech:
Barbaric group(gallic, celto_pannonian_group, belgae_group) - 9 Tech

Oratory Tech:
Indian group (aryan, pracyan, indian) - 10 Tech