I began to dump my pumpkins (about 400-500) to get goodies from fantine, i decided to go check m progress , however the counter seems stuck when i checked it before donating it said i had donated around 250 pumpkins , it is currently stuck at 249 pumpkins, i have like 300 something pumpkins in my inventory, as well as some of the event items from giving fantine pumpkins, i have refreshed the achievements page a few times but it doesnt change at all. EDIT: Also i wanted to add that last year (2019) near the end of fireside i think i noticed this issue and made a post, however i made it in the fireside forum, i.e. in the forum that dissapears once fireside ends, so i recon taht probably flew under the radar,either way the counter is still stuck.

Did the counter ever update for you?

Yes, i had to file a ticket, if you are having a similar issue try doing that.