Recently, I did a hardcore character on double XP Day. I have realised the XP stacking has drastically changed.

A 600 XP Quest on double XP Day would give 1.2k XP.

Following the same principles since it’s double XP, XP elixirs used (to stack on top of the double XP day.

So a 50% XP add would mean
(Original XP x 2 from double XP day) x 1.5 (50% elixir)

However, the changes I have seen now is the ads % is calculated from the original XP rather than the doubled amount when it’s XP day.

Is this something that has been changed without any announcement or is it just a bug?

Thank you