It looks mostly like Warrant sellers honestly; several posters have noticed the increase in outstanding shares over the past couple of weeks. There's probably a few shorts that hop on and off on these dips, but I don't see anything out of the ordinary:

https://www.otcshortreport.com/company/CYDY

It's important to remember a lot of MM activity will appear as a "short," it's not really shorts in the classic sense.