Downhill Strava Live **running** segments aren't synchronizing

Yes Strava has decided hide/remove all downhill segments 

https://support.strava.com/hc/en-us/community/posts/360035410392-Strava-Live-only-works-for-flat-uphill-sections-

actually very sensible to prevent serious accidents

Depends on your sport.  MTB is all about downhill trails and how fast and smooth you do them (Garmin's own 'Flow' metric in MTB Dynamics is all about this); so Strava have just alienated an enormous community there.  Well done Strava, for yet another massive own goal  

I'm now even more glad I didn't renew my Summit membership last month.  If Garmin could just make their segments offering in Connect on a par with Strava, I might be able to ditch Strava altogether.

Have you even read what they have done? There is no removal of downhill segments. Just from live segments to stop riders looking at their watch on fast downhills.

I get that this only applies to live segments.  There's nothing wrong with occasionally glancing down to get an indication if you're ahead or behind on a one way single track DH MTB segment.  That same argument would mean Garmin should programme people's screens to go blank when running or cycling downhill, so you can't accidentally crash looking at your speed or the map.  It should be left to user choice and judgement; Strava have simply devalued their offer to mountain bikers with this move.

Has anyone noticed that I am talking about RUNNING segments.

Yes, the thing is that Strava have decided to take away Live Segments for all activity types; which answers your initial query as to why downhill running live segments don't work for you.  I agree that it's equally dumb for Strava to do this for cycling (particularly for MTB) as it is for running (particularly Trail Running).  As it's Strava that took the functionality away, all we can do on a Garmin forum is moan about it; if you want to see it fixed you'll have to take that up with Strava customer support (by all means, keep moaning here if it makes you feel better; we love a good whinge about Strava ).

I contacted customer support regarding this issue and the answer has made me quite angry:

"Thank you for contacting Strava. At this time, we do not sync downhill segments to devices for Strava Live Segments. Please keep in mind that our system recognizes even the slightest negative grade, and there may be segments that display a 0% grade that will not sync to devices for Strava Live Segments."

No explanation why that applies to running segments. The same arrogant Strava as before. So much for being focused on the paying users as Strava claimed in their recent letter.