When all sticker slots are equipped in the customizer, any non-equipped stickers get a grayscale effect applied to them, which introduces heavy amounts of lag even on a higher-end device. Even on an M2 Macbook I see extensive lag when switching to and from this screen and scrolling the list.
This could also be dependent on the amount of stickers a user has — I have a rather extensive collection, but it might be mitigated for someone with less.
It seems like the CSS "filter: grayscale" class on the disabled stickers is the problem — disabling this specific line manually (or unequipping one sticker to re-enable the rest) eliminates the lag.
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