I received an email stating I have unread items in SE inbox. When I clicked on the link, the comments had already been deleted. I remember having a discussion with the OP in the comment section not 24h before then, and they were continuing the discussion, but all comments were gone.
Unless this is an automatic thing (which I highly doubt), this behavior makes no sense. If a mod is cleaning up comments within 24h of them being added, they should stop doing that. Given that regular users have no recourse to contest comment deletion, this is a dangerous power that should be exercised with a lot of caution, not taken as lightly as it is currently.
This is the post I'm referring to: Subsetting a Seurat object based on colnames