No one here can say they know what goes on at Facebook. Perhaps it was a glitch. But, the timing of it makes me suspicious.
Like I said, I got all my friend's FB invites on time for parties before that Feb 2021 one, and I even got the FB invite to her HS graduation party for that summer.
I'm just curious if any other forum member has had a similar experience with FB in the time frame of early 2021.