The AS350 B3e had "tail issues".
Eurocopter falls back on load compensator as fix for AS350 B3e | Vertical Magazine - The Pulse of the Helicopter Industry (Hyperlink insert not working). The R44 had "blade issues" (delamination - ask Blackmax). Those are examples of "issues"; this one is not.
By the definition applied in this thread there are "handling issues" for all teetering-head rotor craft (negative G tail chop) many Airbus (Jack stall - being a possible contribution to the McCrea fatal). I could go on and list "issues" for most machines by this definition.
I do not see any "tail issues" on the G2, or any other Fenestron tail aircraft - the model list for which is about to increase with the Swiss Marenco
Marenco SwisshelicopterMarenco Swisshelicopter There are no "handling issues" on teetering-head rotorcraft, etc, etc.
Fenestron tails have characteristics different from open blade tails. Learn to fly them, stay within their operating envelope, and no problem.
Seriously, this is not rocket science.
And the training has been modified since the first days, as GS Alpha suggests. There is now much more emphasis on yaw control.