Meetup Speeds Incorrect with Small Groups (46km/h or 28mph)

Known Issues
85

EDIT: This was originally a separate post but got merged into this thread. So its a 2-year old bug that Zwift still haven’t sorted? LOL, figures…

Occasionally when riding I get passed by a small group of riders who are going substantially faster than me (an apparent speed of around 60-80kph) despite putting out low power. In this case the riders were doing under 2w/kg.

When this happens the riders are always in a small group/bunch so I assume in a meetup with “rubber band” applied. It seems as though the algorithm to calculate the power is faulty in some cases.

I’ve seen this several times but this is the first time reporting this. Things I’ve ruled out between this and previous instances:

  • Riders have not just finished a sprint and coasting on speed built up from previous higher power output
  • Happens on flat routes, so riders are not free-wheeling after gaining speed whizzing down a descent
  • I’ve never had this happen with a single rider, always small groups of riders so I assume meetups.

(I did do a search for this and couldn’t find anything. But the search sucks)

Screenshot below, the riders were gapping me at around 1second extra gap per second of elapsed time, despite power being substantially lower:

IMG_2118.PNG
IMG_2118.PNG1000×733 67.9 KB

86

I think this was an issue a while ago (as you mentioned) then it kinda got fixed but from time to time is still broken and seemingly not enough people are bothered by it for zwift to want to re-look at it. same as a lot of stuff on here.

87

Makes a lot of segment leaderboards meaningless, they need wiping for the brand new Companion app feature to mean much.

1 Like
88

Im guessing those are the same two guys who did the Epic KOM in under 13 minutes today. Ludicrous. This is a bug that definitely needs to be fixed.

2 Likes
89

Not much point wiping the leaderboards unless they fix the bug Steve though, or they’ll just get repopulated with bad data again until this bug is fixed. I do also think its worth them blocking zpower from leaderboards now too - the number of time sprint segments have zpower riders at the top is ridiculous. zpower riders should be able to ride freely in world, but its not right that they can compete in races or take segments.

1 Like
90

I think they meant take them out of your personal leaderboard not the overall ones.

91

Did I imagine that they fixed it and it broke again? Or did people just stop using it because it was broken?

92

We used to get that bug often but Zwift fixed it. We have not seen it in a very long time.

It seem like there are very edge cases (or hacks) where people will cruse at 46km/h

93

This bug is NOT fixed. It happened last saturday 3/18/2023. I created a meetup, two peopleshowed up, we sped along at 29 mph through the makuri 40 route. we tried repeatedly to break the rubber band to see if that would help but couldn’t break the rubber band. I even stopped for 30 seconds (no movement) and still shot back up to 29 again once I started pedaling.
I repeat, this bug is NOT fixed.

1 Like
94

Did they late join.

What devises were the people using?

95

I often see two people cruising around at high speed too so i agree it isn’t fixed in all cases.

96

It’ll be fixed when we roll out rubber banding improvements.

97

Hey @shooj, it’s September 2023. Any news? :grimacing: