Treasure counter did not reset. If you are counting by the number of rares you pulled, you likely did not reach the 900 scrolls required for a super rare yet. As the 1% rng chance to draw a rare per scroll will become significant by the time you draw over a dozen rares.

For example, my f2p char has drawn 15 rares, but actually only used 650 scrolls and 72 free draws, nowhere near 900 as the rare count would've suggested.

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The super rare happens at a fixed number, every 900 for kage, 400 for tendo. Players that reported a lower count most likely did not include free draws; while players who reported a higher count likely counted using number of rares pulled. After all.. how many people would actually bother making an exact count of something like that.