I wish to bring up a possible bug at my end while playing.
It's not saving my data from the 2020 Advent.
To be fair, I am one of those who regularly clean their PC with CCleaner and such (I do it every other month in a year) but when I eventually got access to the skins in the 2020 Advent, here, it tells me every time I come back to "log back into the 2020 advent" to get the skins from last year. I do "login" to last year's advent before I come here every day to get them back but it can get annoying to have to do that every time I come back.