Im refering to the Throw Mine toolbelt skill, Mine Field.
With 30 points into the Tools trait line, and a 30% Tool Belt Recharge Rate reduction, the tooltips indicate Mine Field recharges in 15 seconds.
However when detonating the Mine Field, (or when all the mines are triggered) the recharge is actually 20 seconds.
Its been like this since launch, and it makes putting the Throw Mine ultility into my build kind of questionable.