BM Hunter, Call of the Wild doesnt do dmg?

Hello guys, so i did notice on warcraftlogs that sometimes on my main a have really low dmg on Call of the wild (like 2,6%, 7M) but some boss fights its about 15% (50M) dmg and second dmg source (after kill command). On the other hand, i recently made new alt which is also BM hunter and noticed that every boss fight the Call of the Wild does huge dmg (about 15%) and its everytime second most dmg source. So now im questioning that it might be bugged on my main for some reason? Does anyone else experienced this? Also on alt i dont have pet names so is there a possibility pet names can cause this dmg loss?
Stats are same, talents too… It happend on kyveza, ovinaxx and silken same story