Good but has bugs

Im glad they added Japanese, it works perfectly. But when I do cluck on the sound, it doesnt sound right to the options or they sound like another option but its wrong. And the Spanish lessons keep messing up with my progress. Ill complete all the lessons and the bubble with be gold, I close the app or change to a different lesson, it wipes the last lesson I did and takes away the gold. Last time it did it to 4 of my gold bubbles and Im kinda mad because I wont be able to progress without their completion.

TI 23 about Duolingo Learn Many Languages for Free, v5.1.6