I created an advanced workout on Garmin Connect, with a "Warm Up" step, a single interval step, and a "Cool Down" step.
I selected the duration of the "Warm Up" step based on HR and no target, so that when my HR reaches a value that I set, the workout proceeds to the next step. I set the interval step based on duration, with a HR target. Finally, I set the "Cool Down" step with no target and go until my HR goes below a set HR.
I transferred this workout to my FR 405 and did the workout. The "Warm Up" step on the device reads, "Run until HR < [value I had set]" when it should have been "Run until HR > [value I had set]". It did the same thing for the cool down step, but for cool down that is expected.
I created the same workout in Garmin Training Center on my PC, and the workout correct on the 405.