The relationship with my spouse (Rafael) was reset to 0, seemingly after the Harvest Festival in my 2nd year. I noticed sometime after the festival that he never came back home and he also couldn't be found anywhere on the map or in the list of NPCs. When I did find him, he introduced himself to me as if we'd never met, even though we had gotten married just two in-game weeks ago. Our relationship went from 10 hearts to 0 out of nowhere.
I play on PC, game version v1.1-1225, input mode is keyboard and mouse. I've attached my save file below.
Did you happen to try to search for Rafael in the list of NPC menu at that time?

