I have experienced this several times, with different persons:
- guy on friend/contact list sends you invitations for detachments etc.
- you don't want them, cuz currently not doing detachments
- check/uncheck all relevant options in settings -> no result
- remove guy from friend list -> no result
- blacklist guy -> no result
....invitations still spamming my inbox.
Any known workarounds or maybe a real fix?