This is not a bug. This is statistical probabilities in action.
i know very well its not a bug but the problem is next
i have orange/red items
i have max stats (what that meen - investing over 200 millions gold more from this guy)
my items are not broken
and many other thing and in one moment you loose from some one who is not active from 6 months or 1 year or two years
Then my question is what is the reason to play this game when every one can destroy you on arena ???
i want when i am playing and investing in my hero at least to beat all guys who are non active from 6 months or 1 year JUST because i think its fair
expecially when your hero is in very good condition for his level !