Oops, didn't look so far in the history of reports, because I was pretty sure it was possible to have oil on other patch in some earlier 0.17.xx, so the bug wouldn't appear before that.

As stated in title - when we have crude oil overlapped by a patch of other resource, then the oil (purple dots) is visible on map generator's preview, but when we start the game, there's no oil in that spot.

As far as I remember, in previous versions, it was possible to have oil in the area where ...