Hearthpwn

I was trying to complete the Battlegrounds achievement They Grow Up So Fast.
It requires to end your turn with a 60/60 or larger Tabbycat.
I did just that. I ended the turn with a 63/61 Tabbycat. See pic below.
Yet I did NOT complete the achievement... What am I doing wrong?

SIdenote: I also tried it in combat, where I had like a 300+/300+ Tabbycat.
That dit NOT complete the achievement either (which is ok since it isn't End of Turn)




EDIT: corrected image link

Addendum: It already had the 63/61 before End of Turn effects took place.

Today I had a Tabbycat (non golden this time) that was 87/69 at the beginning of my turn and thus also at the end of my turn. It also survived combat with 60/60 or larger stats. Still no achievement. What am I doing wrong? If someone could let me know please, so I can stop wasting my time on this.

I guess you could contact support with that. Might be related to the HP (your quest shouldn't as Tabby is a token).