Bonedancer is unplayable in this way, can you fix as soon as possible pleas?

Hi i have a bug with Bonedancer : i use 3 warmage sub pet, but about one hour the last one dont stay stick like other while im running around. He loose speed slowly until disappear because i so distant. Using only 2 sub pet there is no problem, they stay stick and have same speed. Resummon, relog an...