Michael Burry's substack answers this in his articles over the last week. It's along the lines of there are a number of market players that are taking on similar position in the market. These market players use leverage. Because of how many players there are, and the different levels of leverage involved, if the market goes against these crowded strategies there tends to be a sharp unwind against these funds. People know this dynamic exist, and so when the unwind slows down they jump right back in there as the forced selling stops and re-levering occurs again.