Some Toons Can't get the XP Buff?

Orjix

so i hopped on today for the first time since the witches festival began, and was eager to get my Lv 20 Dk up to 50, i first got on my main and gave him the XP buff by blowing the whistle, and grabbing a plunder skull. from there i did the same thing on my next 3 toons. then things stopped working, i logged on to my Dk i was looking to level and got ready to grind in one of my favorite delves, i port to the nearest wayshrine and run in, once in i blow on the whistle, but nothing happens. the buff didn't get applied. i tried reloging, disabling addons and reloading UI but nothing worked. i thought it just might be because this toon wasn't around last year, so i do the quest, but still nothing happens, the toon will/can not get the buff.anyone else having this issue?

Draffut

Try getting the whistle from the crown store again, but on that character

Orjix

@Draffut

tried that, didnt work

Megabear

It doesn't work at times, not sure why. But it works again later, maybe after zoning in somewhere. I try not to move when I use it because proximity to crowns/pot matters I think.