Sadly for those hoping it was fixed, it is still broke.
Firmware History / Status:
Original Firmware on watch 3.x:
Workouts worked BUT the count down rest timer, counted up instead infinitely. Workaround, pressing the lap button would continue the workout just fine.
Firmware 4.x:
Rest timer fixed. Workouts BROKE the following ways with random characters above interval:
Situation 1: A repeat step would repeat infinitely.
Situation 2: After a successful repeat, workout would randomly jump ahead or instantly complete regardless of additional steps.
Firmware 5.07:
Rest timer fixed. Workouts BROKE the following ways with random characters above interval::
Situation 1: A repeat step would repeat infinitely.
My first workout with the new firmware, but since Situation 1 didn't improve I assume Situation 2 is also still present.
Also, these work flawlessly on the Forerunner 935.