Eternal Apple skips cast for no apparent reason

If you get enough cooldown recovery speed, you can get warcries to have a 3 second cooldown. If you use eternal apple, scold's bridle, sources of minimum endurance charges (or -max), and a source of "gain an endurance charge each second if you've been hit recently", you can permanently auto-cast warcries at a rate of 1 per second. However, after ~12 casts, the loop will skip a cast for no apparent reason. I have a few eternal apple characters that used to work perfectly, and now it has this skip on each one of them. Maybe a minor bug, but this makes my berserker build's berserk go on cooldown each time this happens as the warcries are how I sustain rage. This did not happen in the previous patch, and I would like to say that the trigger skills costing mana has greatly reduced the fun of the build, as I now have to spam enduring mana flasks to sustain mana, even with leech. I've stopped playing this league because of the mana changes and the bug, but I hope at least one of these things will change by next league.

enough mana or not

I have enough mana for the endless warcries, only have mana problems when I'm also attacking things (and I only have a 4link lol). The bug is very noticeable in hideout where I'm not doing anything, just the warcry loop which pauses every so often.

please fix