Guild Wars 2

A stack of drops of Liquid WvW Experience (the ones from dailies) disappeared from my bank.

There wasn’t any mention in the patch notes about this and I’m still the same rank (they weren’t used), so I’m not exactly sure what happened.

They did mention this that all the wvw experience would be turned in to boosters

Changes to Liquid World Experience

In the interest of fairness to PvE players, we didn’t want to allow any WvW players who may have been stockpiling liquid world experience to instantly rank up a bunch of times and immediately begin unlocking the new expansion hero challenges the moment the expansion released. To that end, we’re making the following changes to liquid world experience:

On patch day, any leftover liquid world experience consumables in player inventories or banks will be converted into 50% WXP booster consumables.
These WXP boosters vary in duration (15 minutes to 10 hours) depending on the type of liquid world experience item replaced.
The laurel vendor will no longer sell liquid world experience.
Daily WvW achievements now reward 20-minute general experience boosters rather than 250 liquid WXP consumables. These experience boosters are consumed immediately and grant boosts in all game modes, boosting experience, world experience, and Player vs. Player rewards.
In all other locations, liquid world experience consumables have been replaced with new, automatically consumed instant world experience consumables of equivalent value. While it’s still possible that on a rare occasion you’ll earn a keg of world experience, it’ll just be consumed instantly.

source
https://www.guildwars2.com/en/news/earning-hero-points-in-world-vs-world/