Weird Issue with my iCloud Folder

Something strange is happening with my iCloud Drive folder on my Mac. Folders keep appearing on their own, with odd names like *SwingUpdater*, *SFU*, *authkit*, and *appdefense*. Sometimes there are dozens or even hundreds of these folders. I also see other folders with sequential numeric names like *1*, *1.1*, *1.2*, and so on.
What's even weirder is that when I open iCloud Drive on another device, everything looks normal—my folders appear just as I expect them. This strange behavior only happens on my Mac. I’ve tried deleting the odd folders, but they just reappear.