Mysterious sleeping mark on Jigsaw Challenge (Penalty? Cooldown?)❓

Lately, I've noticed an unfamiliar moving sleeping mark (😴) on the top right of the 'Jigsaw Challenge' icon. Does anyone know what it means? I initially thought it was a mark for idle apps, but since I've been launching it frequently for Time Quests recently, that doesn't seem to be the case. Other games that I haven't launched at all don't have this mark. I wondered if it might be a cooldown period for Time Quests, but other games targeted for Time Quests don't show this mark either🤔 I'm curious about what this feature is! If anyone else is seeing the same display or knows the meaning, please let me know.