In the Little Big Tengu event you get to see one of Kagekiyo's flashbacks, only to reveal that Guda was astral projecting and from everyone else's perspective they just stood there unmoving for five whole seconds. So first of all, love my bitch Guda who automatically connect to any mental wi-fi hotspots they come across. Second of all I choose to believe that everything you see in fgo is exactly as Guda perceive it. From their perspective they arrived in Chaldea, solved the Orleans singularity, ended up in Kogetsukan, jumped back to Septem, fell into another event in the far-off future, ect. They're experiencing time nonlinearly, Slaughterhouse 5-style. No fucking wonder they're haunted by so many deaths, from their perspective they keep jumping between points of time where the person is fine and then where the person is dead. They're mourning people who are both dead and alive at once.