fanduel daily slot mission reset after i changed games.

so i was grinding through the daily slot mission and made some spins on a random slot, got like halfway, then switched to another game to test my luck. when i came back, it looked like my progress reset or vanished completely. not sure if it's a bug or just the way these missions work, like maybe only specific slots count toward the mission and changing ruins it. i try to keep to high volatility games for these, but this just seems like another weird thing to trip up people moving between games. curious if others have hit this snag or if i'm missing something obvious with the rules.