It might have been a one time glitch. I haven't heard of any pet xp rollback before.
Thread
Rebalancing crafted gear
Current crafting and material system is a big part of mob drops, but the resulting gear is pretty meh even if you get a good roll, and a good roll is extremely unlikely. ☆gear and ☆☆gear stats are terrible, even ☆☆☆gear is fairly low for the level, molds/instance stuff can match ☆☆☆gear that's 10 levels higher, and are guaranteed to come out with generally useful stats.
This also gets worse the higher level you go, with material droprates decreasing, chances for ☆☆☆/ ☆☆ decreasing…
This also gets worse the higher level you go, with material droprates decreasing, chances for ☆☆☆/ ☆☆ decreasing…