This is more a bad behaviour than a bug imo :)
Describe the issue
If you press the 'G' hotkey before putting down a research center you are able to see the tech tree.
To Reproduce
Steps to reproduce the behavior:
- Start a new game
- Pause the game
- Press 'G' Hotkey
Expected behavior
Expecting the hotkey is disabled until the first research building is build. Seeing that the research button on the bottom bar only appears after putting a blueprint of the building down.