Unwanted level decrease

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today, while I was playing, when I hit something my level had decreased by half. I have tried many times but same thing happened again and again. Here is screenshot:

http://prntscr.com/jiymxq <--- level 68

http://prntscr.com/jiynxi <--- level 34
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Ice Clan
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i remmeber i had this as well at a given point. Joining a new game should get rd of that i think. However i never really understood that