It seems that the Route detail page (when you click on a Route under your Strava > My Routes) has changed recently, and doesn't display which segments are starred. You need to click a Segment to star or unstar. This worked just fine in the "old" (much better) version. Which is a BIG anoyance to me.
With the old page, I could plan a Route, and then easily star Segments right on the page. Those starred Segments were then pulled over to my Garmin Edge. The new page makes this way more difficult. I would need to click on each Segment separatelly, and there are dozens of them.
Futhermore, on the "old" (miles better) page, when you put your mouse over a Segment, it displayed where it is on the map. This feature is gone.
Please, bring back the previous very good Route detail page.