I am revisiting older jumping puzzles that I have done on my main with a new character, so this character has never done these puzzles before and am not getting credit toward my monthly.
I’ve completed Vexa’s Lab, and Pig Iron Quarry without getting credit. (I got an achievement for Vexa’s Lab).
You should get credit for a jumping puzzle before you start doing it; in other words, you don’t need to complete the puzzle to get credit towards the monthly achievement. That also means that you’ll want to check your progress on the achievement before you start the jumping puzzle to make sure that you haven’t already received credit for it.
If you’re certain that you have not received credit for a jumping puzzle, please let us know which ones you suspect may not be working right. Thank you! 
The WintersDay one did not work for me!!
So I just found out that the Wintersday JP is the one exception that is designed to not give credit. My bad. >.>
