I didn't test the item but it sounds that it may be a bug. Or you didn't get lucky enough to get more procs.
It is possible to get them every time. Some of the ingredients of the epics have quite a good drop chance. But in the has-to-come version they all will be reworked so... yeah.
No, it says on the item that I get the procs. It's been going up from 1 to 15. It seems to be the same thing with the item that gives you strength when you take 1k dmg multiplied by your hero level. It shows the same amount of strength, but it seems that I get the hp boost as if the proc and the static boost both are working, but your attribute only shows the +13 stre.
Also, I managed to skip the maze where you have to find the right path without getting teleported back. I just aggroed the pack of mobs to the right that had a Acolyte that teleported me directly into them.
I'm not complaining btw, the map was awesome, just wanted to let you know about it if you ever wanted to fix it.