This item is just a giant mess for me. I farmed mine and got the item with Haste proc. So for so good. I ate haste buff food, it turned into a mastery one. Well, not so good. I read online it resets with the daily reset. It didnt. I ate haste food once again because I read that it turns based on the food (lol). Got versa crit master haste. Unequipped the item and now I am stuck with mastery again?
Bugged item. Did not make a new post because my problems are so similar to yours. So my current hotfix for this is to farm and then have a bunch of these and equip the one which has haste (or whatever) on it.
I had one turn into haste today, was happy, and logged out just to have the trinket go berserk right after I logged back in. The trinket changed 6 times in 1 second and ended up back in mastery where it was yesterday 