Geoff Goodman admitted that there was a bug with Widowmaker character in Overwatch. He explains it in detail in his reply on the battlenet forums.
So we went digging into scripts pretty hard after reviewing this thread, and we did find one bug that is probably causing some confusion for you guys. The bug is this : The first shot she ever charged would take 0.1 s longer to charge than any subsequent shot for the rest of the match. Keep in mind this bug has been in forever, this isn’t a new bug to the PTR.
We’ll have a fix soon, thanks for checking this out.
You can read the Battlenet Forums.