Odd mapping omission in Specialized app

Jeremy McCreary

Bought it anyway
Region
USA
City
Carlsbad, CA
Would love some help figuring out a Specialized app (SA) problem first encountered today after 3,500 mi of use.

Screenshot_20260321_145612_Wahoo.jpg

This morning's 17 mi lagoon loop, here perfectly recorded, profiled, and mapped by my handlebar-mounted Wahoo ACE and its phone app.

Screenshot_20260321_155551_Specialized.jpg

The SA running concurretly in my pocket also recorded and profiled the ride correctly. But oddly, it somehow failed to extend the red route trace beyond our last stop. Even though it clearly had the data to complete the ride profile perfectly.

20260321_104511.jpg

SA's red route trace ends exactly where I took this shot of the east end of the Batiquitos Lagoon, wetland, and floodplain. Never touched the SA there, just the camera.

No idea what SA was mapping in real time after that, as it was in my jersey the whole ride. The Wahoo provides all handlebar GPS and mapping services.

Screenshot_20260321_145641_Ride with GPS.jpg

Sent the SA's .FIT file to RideWithGPS for display and analysis only. And once again, complete profile, truncated map trace. In this case, RideWithGPS only knew what SA told it about the ride and made exactly the same mapping mistake.

Thoughts? Thanks!

Why record with both Wahoo and SA?
Easy. Much prefer the way SA records, displays, and analyzes bike-specific data like rider power, motor power, and cadence. But I keep my phone off the bars to avoid camera damage. The Wahoo is made to withstand handlebar vibrations and provides better GPS and mapping services at the handlebar anyway.

May seem clunky to use both this way, but it checks all my boxes, and I'm happy with it. Until today, the SA did its part perfectly.
 

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I can only guess. A segment is lost from mapping if for any reason the given device has lost its GPS fix. That would be the phone in this case?

Interestingly, I had early issues of this kind with older Wahoos (not the phone) but for the ride start. If I started my ride before the GPS fix was obtained, the Wahoo ride data from the e-bike were correct but Strava would only report the mapped distance. Now, Wahoo 3 clearly displays orange if no GPS fix has been obtained.

So, it looks your phone was unable to get the GPS for the last segment of your ride. Nothing strange these days... (No Battery Saver on for sure?)
 
I can only guess. A segment is lost from mapping if for any reason the given device has lost its GPS fix.

Thanks, makes some sense. The Specialized app on the phone succeeded in collecting the data needed to profile the route. But it could've gotten that from the phone's altimeter. The horizontal coordinates needed to map the route would have to come from GPS.

That would be the phone in this case?

Yes, only the phone, and it was well charged the whole ride. Battery saving disabled. The Wahoo running concurrently was unaffected.

Now, Wahoo 3 clearly displays orange if no GPS fix has been obtained.

Will have to keep an eye out for that on the ACE.
 
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The Wahoo had clear sky for the entire ride, but your phone may not have. There are multiple GPS satellites in orbit, but a combination of terrain and your body may have caused a dropout that SA cannot handle.
 
I'd just add this to the NASA queue. . .
They're probably almost finished with determining the vibration frequency of your handlebars for your phone mount
w00t2.gif
 
The Wahoo had clear sky for the entire ride, but your phone may not have. There are multiple GPS satellites in orbit, but a combination of terrain and your body may have caused a dropout that SA cannot handle.
Thanks! Come to think of it, I did put on some weight over the holidays.
;^}

Looks like my Samsung S25 Ultra may have a problem with dropping GPS links after a recent update. Will try the recommended remedies and see if it happens again.
 
Sorry to hijack this thread, but how do you like your s26 Ultra? I'm a big fan of the Samsung flagships but I don't like to update every year.
I avoid the latest flagships at all cost with their exaggerated price and their beta hardware/firmware that end users test. Just ask the OP about repeated camera focus failures.
One step down is typically far more reliable and reasonably priced.
 
Sorry to hijack this thread, but how do you like your s26 Ultra? I'm a big fan of the Samsung flagships but I don't like to update every year.
I have the S25 Ultra now, and the Note20 and Note5 before that. It's a very nice phone all around. I tend to keep phones for years, so buying the very best Android available at the time makes some sense.

Only S25 complaint is that the screen's minimum touch sensitivity is still too sensitive. And now, it MAY be dropping GPS links.
 
. . . and I just don't get documenting every pedal crank.
When I ride I like to clear my mind and with as little tech as possible. I carry a phone only for emergencies and only the most demanding of responsibilities. Otherwise I'm off the grid.
 
. . . and I just don't get documenting every pedal crank.
When I ride I like to clear my mind and with as little tech as possible. I carry a phone only for emergencies and only the most demanding of responsibilities. Otherwise I'm off the grid.
I have never been into heart rate training, I go by breathing and effort and don't look at the gadgets while exercising (maybe the speedometer once in a while). But I do get motivation out of seeing metrics improve over time. My resting heart rate goes down as I get in better shape, as well as other things improve that the Garmin tracks like VO2 max.
 
I thought phones used cell towers in addition to GPS when tracking location. Maybe you were in an area with poor cell coverage.
Interesting thought. Wouldn't have guessed poor coverage where the map trace ended. Wide open area with lots of homes and businesses nearby.

Besides, I record all rides and ride near that spot often. Never a problem before yesterday.

Haven't yet ruled out a chance encounter with a passing space-time discontinuity or rift in the subspace tachyon field. Those were the usual suspects when weird stuff happened on Star Trek.
;^}
 
I have never been into heart rate training, I go by breathing and effort and don't look at the gadgets while exercising (maybe the speedometer once in a while). But I do get motivation out of seeing metrics improve over time. My resting heart rate goes down as I get in better shape, as well as other things improve that the Garmin tracks like VO2 max.
I can understand that... but at the same time I know when I'm in shape and when I'm not and the numbers at least for me end up being anecdotal.
When I can push myself, I do... and if it's been a long day already or I'm just under the weather I'll ride at a comfortable pace. Most rides it's a mix of both.
At this stage being happy is more important than trying to live forever and keeping track of the details is just something else to stress over.
ymmv
 
. . . and I just don't get documenting every pedal crank.
When I ride I like to clear my mind and with as little tech as possible. I carry a phone only for emergencies and only the most demanding of responsibilities. Otherwise I'm off the grid.
The good news: You don't have to get it for others like me to find it interesting or useful.
 
Tru_dat... as I thank the good lord.
The Good News: NASA has dropped everything and has fast tracked your issue. They're currently running a quality assurance and specification validation test on all GPS hardware. 🙃
y 📶 m v
 
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