Previously when you genned a new map, the map would automatically select itself from the list so you could easily see it. With the recent update today, the map is no longer automatically selected and you must go through all your map gen maps to find it.
New client update issue - new map gen maps not automatically selected anymore
Yep was present in the alpha client, see https://forum.faforever.com/topic/6896/cannot-generate-random-map