I clearly remember fixing this bug myself in Reicast core. The bug is that everytime you start a game you have to re-enter date and time settings. The solution was to load to bios (instead of a game), set date and time and it would fix the bug. But now for some reason this came back again, after loading a game i get to the date and time screen. but the bios fix doesn’t work anymore. I think an updated Reicast core might got a regression or something?
Also, i can’t find the latest version in buildbot. Everything seems to be from May 2018 or older…