I experienced tool bouncing yesterday when I was roughing out a few bowls. I think the issue is the cutting force on the tool changing going from end...
I was thinking about my neighbours brother who landed on Juno beach 80 years ago and as a sniper somehow made it through the years and returned home....
I took it to a machine shop and after looking at it he showed me were it was actually hitting because it was too long....he told me to grind it down...