I don't have a CVT and I cant find any tech specs on the net - so this is guess work based on real principles:-
Don't press the accelerator and foot brake at the same time.
what I researched -
All Honda CVT systems utilise a belt that gets 'pinched' at both ends by V shaped clutches. Imagine a wide belt that can ride up and down V shaped cones at either end of the belt.
Clutch 1 obtains power from the engine. As the engine revs increase it pinches the belt, the belt moves. (Drive)
Clutch 2 obtains power from the belt and transfers it to the driving wheels. As the belt moves it transfers the rotation to the driving wheels. (Driven)
The mechanism is balanced. What that means is, if you stomp on the accelerator the drive valley will be wider (Belt low) and the driven valley pinched hard (Belt high). This pushes maximum power through the system.
Assuming you keep your foot fully to the floor the drive valley will pinch to the top and the driven valley will open up allowing top speed.
Before any ECU trickery, (that is before engineers providing software & flappy paddles and brake sensors) - the 'balance mechanism' is very Victorian. Springs, counter balances, centrifugal force, slide-rules and excellent engineering do the thinking for you without the need for software.
Victorian bit - Load imparted through the driven wheels gets emitted back through the 'balance mechanism' and alters the drive/riven ratio gearing.
Honda also has extra clutches to facilitate start, forward and reverse. (Rather than use a torque converter)
The 'ECU trickery' will know exactly what you are doing with your brake peddle.
The Victorian bit wont know about Brake Priority Logic planned for in the ECU. It might be a legal requirement / non-requirement for the ECU to react in a particular way to brake + accelerator positive inputs.
The bottom line is that the 'go' peddle in a car a car is not meant to be pressed at the same time as the 'stop' peddle because if you need to use a brake in that situation it is the hand brake.
Contact Honda.