HZ123 it's a very sore point the one you are raising. Unfortunately different airlines have different procedures in place, which end up confusing ground staff. My airline has a "no steps/jetty no doors open" policy and I completely agree with it. We had a couple of accidents before the sop were changed and it was not fun for the crew involved.
However we also have the silly rule that
if steps are in place at the back, whatever the situation or phase of turnaround, the rear door must be open anyway. Not clever when it's 2*C, with strong gales and persistent rain entering the cabin making us all freeze and making the galley surfaces really slippery!! Big hazard in more than one way, in my opinion.
