when i maxed out stamina in the dojo it decreased by 10?
I can't seem reproduce this on my end. Is it possible you switched turtles or changed your footwear around that time? Different turtles have different max stamina values, and footwear can also affect your max stamina.
it was because my footwear broke mb
No worries, and thanks for taking the time to report it anyway. Let me know if you run into anything else!