Bugs or scam of gameloft???

I have tested some ability recharge time gears with stop watch, all not work as value shows, much different.
Like in the fig. the recharge time is about 15, but actually it's about23.
Is it a bug???!!!Or it's a scam of gameloft to earn money???

LOOK AT THE AWESOME RESPONCE? Can't answer this persons question after 6 months?

They take our money and make it so difficult to upgrade gear due high chance of failure. **** that