Bubble Wrap challenge bug

[nemo]

hi everyone

i was trying to do the bubble wrap challenge 5 months ago but it still the same 44.will it was 40 and after 2 month it increased to 44. just yesterday i get full battery 300/300 and i opened the bubble until i run out of energy but the challenge didnt increase and it still on 44.is it a bug or i am missing something 

Edit : there's no bug here . like roy said i need to open bubble then close it after 10 seconds . leaving it open till i run out of energy doesn't count.