Reply 20 of 21, by Dege
Yes, it's easily reproducable, thx for bringin my it to my attention. Even the complete menu is missing when Alt-Tabbing back to the game which gets into a paused state automatically.
TBH, I don't know the reason yet. I cannot see an error or bug so it must be a subtle incompatibility, a needle in the haystack, because the game simply does not draw certain 2D elements after the game window loses focus.
You can workaround that though by disabling option 'Disable Alt-Enter to toggle screen state' to avoid 'device lost' state in D3D9.