I can see you're probably not a pilot, apologies for the shop talk.
Some carriers have a policy of turning off a flight director if it wasn't giving pertinent guidance e.g. on a visual approach without navaid path guidance. Others leave the flight director on but use caution because the information displayed may be misleading, especially on older nav systems without GPS or WAAS. I believe I used flight path vector years ago on visuals at a couple of carriers in the A306, but as I said, I've never flown the A320.
Sorry if we confused you, hope this helps explain what we're talking about, have a good night.
