on my site https://storagearea.network, while logged in, ?swcfpc=1 is getting added to every URL. Google is also trying to index this URL for some reason as well.
I was looking up something else but came upon this site (and love GP) so wanted to drop an answer, since this page comes up in searches related to other issues with the plugin of interest…
that suffix (?swcfpc=1) is added by a caching plugin (which, despite the name of it, is not an official Cloudflare plugin.
Control that URL suffix in settings for that plugin, or uninstall that plugin.