Time set day resets singleplayer world day to day 0

Tested in 21w37a as well, happened there too, so I speculate that it affects every snapshot. When Using the command /time set day it resets the world's day tracker to day zero. I don't think that this is intended. I added 15 days to the clock to give an easier to read change. Picture one is set at day 15 and picture two is directly after using /time set day command. Debug menu is open. My 21w44a world has in the stats, been open for a few IRL days, so that day counter should not say day 0, yet it does. (not pictured but is the same issue)