I came across this elsewhere on i'interweb & thought I might share it.
In summary - tp save you all opening the offical document:
DOT NHTSA ODI Document
Summary:
The Office of Defects Investigation (ODI) is opening this Preliminary Evaluation (PE) on model year (MY) 2012-2020 Ducati Monster, Multistrada, Supersport, Panigale, Scrambler and Diavel model motorcycles based on allegations of loss of braking performance.
ODI is aware of 22 consumer complaints alleging extended stopping distance due to a loss of rear braking. Many consumers allege the rear brakes failed until several applications of the rear brake lever, while other consumers alleged a total loss of rear braking. In addition, many consumers allege this condition occurs without warning.
ODI learned Ducati released several service bulletins for the subject motorcycles that address a rear brake performance concern. One of the bulletins describes replacing the rear brake line. The campaigns instruct technicians to inspect and replace the brake line, only if necessary, following a consumer complaint. A newly designed brake line, that does not allow air to enter the braking system through the collar of a banjo-fitting, replaces the existing line on a complainants motorcycle. The updated brake line is more robust and manufactured to a different tolerance and design. In December 2020, ODI became aware of a crash and injury allegedly caused by a loss of rear braking on a motorcycle that is part of the subject population.
A Preliminary Evaluation has been opened to determine the frequency of this failure mechanism and to understand the conditions that might influence it on the subject vehicles.
It would seem there were just 22 complaints in N.America, you may remember a news article earlier this year about Ducati N.America's offices being 'raided' and files being taken away? I wonder if that was related.
Anyway, I think the rear brake on any bike is secondary when it come to stopping - surely 70%+ of the braking done with the front brake and I'd guess that goes to 90%+ in an emergency situation, it's the nature of a motorbike, a bike's brakes (unless they're linked) and weight transfer.
Still, posted here FYI
In summary - tp save you all opening the offical document:
DOT NHTSA ODI Document
Summary:
The Office of Defects Investigation (ODI) is opening this Preliminary Evaluation (PE) on model year (MY) 2012-2020 Ducati Monster, Multistrada, Supersport, Panigale, Scrambler and Diavel model motorcycles based on allegations of loss of braking performance.
ODI is aware of 22 consumer complaints alleging extended stopping distance due to a loss of rear braking. Many consumers allege the rear brakes failed until several applications of the rear brake lever, while other consumers alleged a total loss of rear braking. In addition, many consumers allege this condition occurs without warning.
ODI learned Ducati released several service bulletins for the subject motorcycles that address a rear brake performance concern. One of the bulletins describes replacing the rear brake line. The campaigns instruct technicians to inspect and replace the brake line, only if necessary, following a consumer complaint. A newly designed brake line, that does not allow air to enter the braking system through the collar of a banjo-fitting, replaces the existing line on a complainants motorcycle. The updated brake line is more robust and manufactured to a different tolerance and design. In December 2020, ODI became aware of a crash and injury allegedly caused by a loss of rear braking on a motorcycle that is part of the subject population.
A Preliminary Evaluation has been opened to determine the frequency of this failure mechanism and to understand the conditions that might influence it on the subject vehicles.
It would seem there were just 22 complaints in N.America, you may remember a news article earlier this year about Ducati N.America's offices being 'raided' and files being taken away? I wonder if that was related.
Anyway, I think the rear brake on any bike is secondary when it come to stopping - surely 70%+ of the braking done with the front brake and I'd guess that goes to 90%+ in an emergency situation, it's the nature of a motorbike, a bike's brakes (unless they're linked) and weight transfer.
Still, posted here FYI
and it works fine for what it does 
however, the laws of physics do favour the front stoppers for rapid deceleration where grabbing a fistful will render the rear next to useless anyway
