Hello, This is BlackSurvival.
At the Black Survival Play Event, which began on November 17, Some users who participated in Team mode did not play the game intentionally to meet the play time. Therefore, we fixed this issue through additional patch.

After the patch, if you do not play the game after participating in the team mode, your play time will not be calculated.

[Revision details]
- If you don't play the game after participating in team match,  your play time will not be calculated.