run_timed_behavior never ends

[bhamon]

When calling run_timed_behavior, the call properly returns at the end of the animation but the behavior continues to play.

To reproduce this, you can simply add the following lines to the cozmo_program function of the 04_stack_or_roll example:

print("ok")
while True:
    timer.sleep(1)

[msintov]

Hi @bhamon! Thank you for the bug report. We will investigate.