Yesterday me feed order (which is set at chronological) suddenly changed putting activities (that I had already seen and given kudos) from the beginning of this month at the top and hiding most recent activities in the middle of the month.  This has also happened to a friends.  No amount of changing the feed order does anything to rectify this.  Why has it happened?

Same, on app and website, feed is just random... it's showing runs I did last month and nothing recent except latest

It looks like Strava made a change which switched the default ordering from latest activities to personalized, I've seen this reported in a few other places. You can change the preference from https://www.strava.com/settings/display under "Feed Ordering" or in the app under You > Gear Icon (top right) > Feed Ordering. See https://support.strava.com/hc/en-us/articles/115001183630-Feed-Ordering

Unfortunately per Strava, the change will only impact new activities so it won't fix the issue right away.

Any changes will apply only to new activities in your feed, so you may not notice a difference at first

I might be an outlier, but I use Strava primarily to view my own activities. It seems that recently the activity feed filter on the website has changed, and it now only shows athletes I'm following by default. I have to select "My Activities" to see my own activities and, whenever I return to the activity feed page, it shows the athletes I'm following again.

In the past I could simply see ALL activities, mine and those I follow. Why has this option been deleted? I liked that.

It seems Strava is really emphasizing activities of other athletes over my own. I found the same to be true in the Android App. After I open it I have to press two buttons to view my own activities and none to view those of others. I only use the app for it's beacon feature, so I don't know if this was different in the past, nor do I really care. It is strange though.

Yes, Strava thinks of itself as a social platform, and I don't mind that, but having to dig around for the thing I'm really interested in seems strange. What's up with that?

If you scroll down a long way, do your own activities appear somewhen in the "I'm following" sections? Strava made some buggy changes to the activity sortings for users which used the chronological sorting of the feed. There is another thread with a similar problem: https://communityhub.strava.com/t5/campfire-chat/activities-missing-in-feed/td-p/41907 

@Jan_MantauYes, even though the feed is set to "Following", when I scroll back to before 1st of September I do see my own activities in the feed. I guess I'm not following myself anymore since the beginning of the month. 🙄

Extra info: My "Display Preferences" > "Feed Ordering" is set as "Latest Activities", since the description of "Personalized" sounds awful.

Did you need to change it to personalized or has it always been set to chronological?

I'm asking because if you changed it,  it only affects new activities so you won't see the change right away. It will display correctly from now on though.

I did try several things so, yes, I might have changed it.

I just did a very strenuous desk exercise of 11 seconds, uploaded it, and indeed it does now appear again in the "Following" feed.

This seems to solve the issue. I guess the "Personalized" feed is new and Strava pushes people to it? I now see that more people aren't happy with that.

Hi @Ajwaller, 
To add some additional context to what @ActivityFix noted; we recently made a change in our model that surfaces older activities a user may have missed amongst newer activities. If you'd like to view your feed in chronological order please ensure your Feed Ordering setting is set to "Latest Activities." If it's already set to "Latest Activities," you can perform a reset by selecting "Personalized" and then switching back to "Latest Activities." 
 
After changing the setting, the feed will not update immediately. Only activities uploaded after the setting change will follow the rules of the new setting.
 
Additionally, there may be some cases where an older activity appears at the top of the feed when an athlete you’re following makes an older activity publicly visible. We do this to make sure you see every activity from athletes you follow as soon as possible.
 
For additional information, see our help center article here: How the Strava feed works

This is a lesson to devs. Don’t fix what is not broken. Suddenly all my recent runs from my own feed disappeared as did all the people I follow. Changing settings did not fix….maybe moving forward but why mess with what works and what people use the platform for. If there is no reliable feed there is no Strava 

there must be some issue with your model. i see completely different activities after every reload

So I did a ride two days ago and it uploaded automatically on completion through my phone. When I opened Strava (web) to admire my achievement it was nowhere to be seen. Eventually found it at about 200th in the feed, buried under entries from October and November in apparently random date order. I had never changed the ordering setting. 
 

I have tried changing the ordering setting backwards and forward several times, but it refuses to put my ride in the correct sequence - if anything it seems to make it worse. 
 

it drives me nuts when something that worked perfectly for years suddenly gets broken by an upgrade. 
 

Strava gods please fix it, even if it needs a one time button to set my entire history to chronological order!  Randomization shouldn’t be an option, but now it seems to be the default.