This was reported here, but I also experienced it in one of the new 10th Anniversary achievements as well.
https://www.reddit.com/r/starcraft/comments/i6n16v/how_do_you_get_the_achievement_for_catch_me_if/
There’s a bug in Starcraft II right now that makes it harder to tell if you’re at a good pace for certain time-strict achievements. The time that’s shown in game and the time that’s used to calculate the achievements are not the same and can cause confusion.
In the video you can see the game is paused at 17:08 where the save is created, but when showing the save details it’s showing a time that’s off by a couple of seconds(shows 17:12). I believe this either increases with the amount of saves that’re created or length of the game increases.
