I made a screen capture video showing the jumpy meter issue may actually be a built-in "feature". I equipped the 3-clicks meter, and while playing I noticed the meter recognizes the stutters we face during play.
The power bar continues its ride past the click. Why would you have such behaviour if not because it's a built-in feature of some kind?
Indeed many other players, consider the jumpy meter a non-related to computer or connection issue. I could be wrong, but it's good to know wgt software does mismatch the click (the power given by the LAST SHOT sign is 100%).
Trying to play with the 3-clicks meter may be worth somehow, because it requires more focus on the meter. Good luck (I have the same problem)