@Lucillesbigsister perfectly normal.
My FiL, I visited more or less daily during his last spell in hospital, held his hand as he died, helped organise his funeral. And yet my dumb lizard brain, for YEARS after, would go,
"Ooh we ought to arrange to see , haven't seen him for ages for some reason that I momentarily cannot put my finger on "
I mean FFS
And, now, it's doing the same thing with my Mum. Intellectually I am well aware that she is dead. I sat in her hospital room when a lovely doctor came round to formally check! I organized her funeral! Gave away some of her clothes! Got a death certificate, probate, planted her grave and took considerable pains over her headstone. Which pretty much always indicates that a person is indeed no longer alive.
Tell that to my subconscious, which is, like a clueless toddler demanding to "go see Granny" two weeks after Granny's funeral, agitating to go shopping for Mum's presents and give her a call.
It must be a very basic mammalian thing. So much of life is seasonal and cyclic, and on top of that, we used to live in big family groups where X might grow old and die but you still had their grandnieces Y and Z and their sisters and cousins, all peas in a pod, so, you know, we're just not that used to "going away FOR EVER".
I am used to the phenomenon now, but I still don't particularly appreciate it :|