HUD RWR question

Hello,

I'm posting here as this is more a question than a bug report.

It was of my understanding that HUD RWR threat indication (line and symbol) flash for missile launch, as (barely) visible on this video.

In today's DCS update it does not, and Matt's video from yesterday doesn't mention it either.

This may have changed over the years, and I don't have any documentation to support it, but maybe someone can shed some light into it.