Once or twice ( I don't drive much at night these days ) the Panda lights are pretty bright and if you leave them on the '0' setting, go over a bump, your lights look they are on full. Or round a gentle left hand bend. Drop them down to '1' setting and it shouldn't happen - its just enough on most roads.
Is it at the same point each time? Then blame the road. The driver is probably flashing anyone and everyone every time oncoming lights make their eyes strain. Wimp.
If you are concerned, do the garage door test.
Better that than the Marea, which no matter what bulbs I put in them or how I set them I don't think they ever are bright enough even on main beam.
Over hear, if you get a double flash either from the front lights, or someones brake lights, it is warning you that there are les flics hiding somewhere up ahead. Totally against the law to do that, but you know, the French can stand up to their government.