Recent games prevent showing the history, but in the description of the boards themselves, it says that history is shown. So why can I not see it?

I'm not sure why you have problems. I checked history of your two most recently finished public games and those were OK. Do you have a link to a game where it's not working?

I'm talking about two recent private games - Expanding Europe and Warfare

https://www.wargear.net/games/player/81319501

I see. I think it's a REMATCH bug, I see it was a long iteration of rematches and somehow history fails in those. I think I've seen that before. Making a new game just inviting the other two would likely solve it for next time.

Sounds likely. Also to address the comment in the game - premium members get no additional views of match history over standard members.