Potential Bug : Stop before start

Problem:
If stop is given to a calculator first, the calc stores this in internal buffer.
When next start is given, it stops immediately.

Potential Solution A:
Whenever a default_control msg (start/stop/reset) is read true, reset all 3 ports.

Shortcomings of A:
Any bad side effect of resetting all ports? When stop & reset are set simultaneously, it wont work. So maybe only reset some ports, not all?

Potential Solution B:
When only start is true, reset all 3 ports.