What if they remove an item, and add it again as a new item?
I'm going to guess it breaks in that case, because I don't think it's doing any clever analysis.
But I also doubt it's big problem. Deleting listings breaks links and is bad for SEO so evading price trackers this way is costly and possibly self defeating.
Unless you're Temu and your whole business model is based on shrouding prices in smoke and mirrors.