One thing I saw suggested was to upload the FFXIV info to the "cloud" so that if it happens, just reload it from there. Not sure if it works(I always put my PS4 to rest mode, while FF is running - either suspended or active) when I go to sleep.

Had one instance where we lost power at home, and didn't have the issue. Not sure if it's because I have the "automatic upload game save info"(or whatever that setting is) active or not, but I've not had any issues other than the PS4 itself saying it wasn't shut down properly and doing it's check(which I just go grab a drink/snack if I see that and come back a little later).