SOP Monkey;
I saw it twice at my legacy carrier in 15 years. Really embarrassing.
I saw it every single day in the far east at two airlines. I even landed once at an airport with half a dozen Boeings. Every single airbus but me diverted. 7 km visibility, ceiling 2000 ft. Light rain. Auto radar showed a big huge thunderstorm. Eyeballs and manual radar showed light rain. My FO wanted to divert.