Tile yields (food/material/essence) refuse to stay visible on the map. I played through an entire 8 hour game without even realizing that this was happening (for reference it was a large map, temperate map type, dense resources). I was forced in to an early war so I took several AI towns which saved me the need to build my own, so I didn't spend much time worrying about tile yields or city placements.

Anyways, I finished that game and I'm trying to play another game, but now that I am more aware of what is going on and what I'm doing, it is painfully obvious that tile yields are visible in certain areas and then disappear. I played through the first 50-100 seasons several times and it happens every single game. It seems entirely random when they decide to disappear or reappear, sometimes only a few tiles disappear, sometimes every tile yield on the map disappears, sometimes its in the wilderness, sometimes its in my own towns, sometimes I have a unit in the area, sometimes I don't. Toggling the tile yield display does not do anything, moving units through or away from areas (where I know there are tile yields) does not work, building outposts does not do anything, fiddling with various graphics settings does not do anything, reloading the save game does not do anything, restarting the game does not do anything, restarting my computer does not do anything.

Has anyone encountered this issue? Any ideas on how to avoid/fix it?