Me and my brother are playing on the outland PVP server. We were bot about 5% xp away from lvl 61 when we relogged. After logging back in we had our xp reset to 2%
I thought that this might just be an UI bug even tho it happend to both of us. So I kept questing waiting to see a lvl up shortly. I kept on going and didn't lvl up.

So therefore I tried to test this again by getting 48% xp to 61 and then relog. Exactly same thing happend again and I was reset to 2% xp. This is ****ing great.
Both me and my brother have now lost 1 lvl + 48% xp.
Only this test i took scr shot
https://imgur.com/a/SC40Z