The problem seems to be related to e-pedal mode only, and pertaining to brake blending. This is by far the worst EV / PHEV that I have ever driven in that regard, and that's been many.
The problem is that the brake pedal position is mapped to an overall braking force. On other words, if you completely lift your foot off the gas in e-pedal, you are already decelerating (quite heavily at that), and now you gently press the brake, which tells the computer that you want to gently decelerate - thus commanding a decrease in overall braking power. Similarly, if you're on the brake and say are doing a California Stop, i.e. easing off the brake before coming to a complete stop, you will feel that the car actually brakes more as you ease off the brake until you get your foot on the gas.
I work in the EV industry so I find this lapse of testing to be simply baffling, as any Ford/Mercedes/Tesla/VW/Chrysler/BMW/Audi EV/PHEV that I've ever driven had completely smooth brake blending (with regen mode), but somehow perplexingly the company that's been at it the longest has such a bug (that probably will never be fixed, at least for existing cars). Baffling. Causes a bad experience for passengers because there's simply no way to do a smooth roll-stop, and is confusing for the driver because one and the same brake position has different retardation as result.