Issue with daily quests not adding to 3x exp boost timer?

Doing duo norwegian course on mobile

When i begin duo for the day, it activates the triple exp boost earned the day before, which lasts 10:00 min. When i complete a daily quest during this time, it normally extends the triple exp boost timer by +10:00 min. For the last two days, whenever i finish a daily quest it shows the animation for adding the 10:00 min, but when i begin another lesson it has not been added. Essentially two of my daily quests are currently giving no reward / the 10:00 min of boost time they give is disappearing into the abyss. Not a huge deal but very annoying, any others with this issue / potential fixes?