Guild Wars 2

I just hopped on my mesmer and received my heavy 2.5k AP chest. Once I opened it, I realised that I was under the effects of 50% mf however there is still 4.5 hours remaining on it. I’m not sure where I got this from since all my mf boosters are still in my bank. None of my guild mates have received such a long booster nor have they had an immediate booster applied on them from opening their 2.5k AP chest.

Open any Kite Fortunes on that character recently?