Update on the status of the Event Leader Fence

Hey Zwifters, here’s a quick update on our work to improve the Event Leader Fence.

Why did we turn off the fence ?
In certain situations and conditions, a non-trivial number of users were being removed from events, even though they were well behind the fence or the leader. In other words, even though some users were riding well, they were still getting removed. Since this is not a good experience for those users, we temporarily removed the fence feature from group rides.

When will we turn the fence back on?
We have tracked down a few issues that we feel were impacting event fences and fixed those issues. We’ve also added telemetry specifically for fenced events to get more data if new issues arise. We will be turning the fence back on for select rides with the upcoming game release scheduled for the end of March. ZHQ will be actively monitoring the rides to evaluate the fixes we’ve put in place. Once we are confident that we’ve solved the issues, the fence will be made available to all rides that wish to use it.

As always, let us know if you have any questions or feedback on this or any other feature in Zwift.

Ride On! :ride_on:

Thanks Wes.

It is good news that you were able to track down the issues, good job.

It is now Also on [Zwift insider](https://zwiftinsider.com/fence-update/

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We tracked down some issues, we’re not 100% certain that they are all of the issues however. :crossed_fingers:

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Lets hope you got all the big ones. I am sure the telemetry will help to pinpoint the issue.

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The interesting piece to this puzzle, at least from what I have seen so far in the Forums, seems to be that the issue is not with the fence, per se, but with the ride distance Zwift is calculating for riders. It seems like the people having the issue are showing to have traveled more distance on the ride than the ride leader, even if they are behind the ride leader. That’s an odd one for sure. I actually see this on a number of rides, generally just 1/10th of a mile, but sometimes more, and have always wondered what causes this. Hopefully the issue has been pinpointed and the solution will work!

If you stay in the blob draft you ride shorter distance, because Zwift gives you a tighter line through corners (actual, not what you see yourself on screen). As a rule of thumb, staying out of the draft accumulates about one additional km per hour at 3.0 blob pace IIRC.

So I’m not sure I buy this theory, the regular KISS at Base sweeper would have been booted about every ride then (ping @Matt_Yankow_KRT ).

Yep I always have the least amount traveled when I spend more time off the back of the blob. The longer I spend sweeping, the shorter it tells me I have gone relative to the blob.

Oh wait, that’s the opposite of what I remembered, I’m old. :joy:

I had discussion with support about this.
I am running Zwift on a 2008 iMac core duo
Apparently the low frame rate 5fps, with a low res screen, could have been causing my extra distance wrt leader.
I was “hitting the fence” when behind the leader.
I do not get the problem if I ride using Zwift on iPad or iPhone.

Yes low frame rates are most certainly something that can impact the distance calculations which are used to create and enforce the fence.

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Hi, Wes are we any closer to having the fence back? I seen various rumours about the next update it maybe back, I appreciate you guy have been working hard on it. Thanks :pray:

The plan is to turn the fence back on for select rides when the next game release goes out. We’ll be monitoring those rides to see how the fence behaves and performs. If the fixes we put in place are proven to be effective in reducing or eliminating improper event removal, we’ll turn the fence back on for all rides.

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Thanks for the update and quick response. Appreciated.

when can we have fence back ?

Please see the comment from Wes (Zwift Staff) above.

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Hi, is the fence back to all rides yet? Is there a time frame? What was the original issue?

Hi @Titanium_Speed7382 please read the entire thread above and you will find all the answers to your questions, but the quick answers are…

No, not yet, select rides only.

No timeframe

People were getting kicked out of group rides when they were well behind the fence and group leader.

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No reply..?

Reply to what, Kate? The answers, as best they are known at this time, are already stated above.

I will tell you that I was on one of the ‘new beta’ rides tonight and the fence was, IMO, worse than it was before. It was skipping all over the place and lots of people were getting the ‘RETURN’ message when well behind the fence. Clearly there is some more work to be done on this before it can be released into the wild again.