My better half encounters it constantly ( as does g/daughter on n/s rear)! However, with front passenger door I lean over and 'double' pull on the handle (quick 1..2). This works everytime?
nb. I can only assume she pulls on the handle (slowly) + I've not got to the drivers door 'locks' to release them .. quick enough?
As to the rear n/s door this works fine once I disengage the 'locks' on drivers door. nb. Some of the times I may have switched off as well, but can't be certain. Generally I've the same issue(s), but the 'double' pull is very effective.