Tracker for ArcGIS, iOS, location jumps to 0,0 coordinate anyone else seeing this?

[MattMeyer]

We are seeing tracks on multiple 1 of 3 iOS devices jumping to 0 latitude 0 longitude. The reported accuracy for these points is >8,000ft and smart rending is NOT filtering these points out. This results in tracks with multiple jumps from Hawaii to the coast of Africa and back.

The field crews are using Navigator and Trackers at the same time. There is anecdotal evidence that the jumps occur when switching to Navigator from Tracker.

We've verified that both apps are Always using device location in the background.

Has anyone else experienced this or found a solution?

Aaron Pulver‌

[Anonymous User]

Hi Matt,

We have had one or two reports of this around when iOS 13 was released/in beta. But the feedback was that updating to a newer minor version of iOS resolved the issue.

Do you have specific device details including the iOS version and the model number?

How often do you see this?

Can you send a sample point that is at 0,0 with all attribute information? If the smart rendering is not filtering it out, then that should mean there is a valid speed and/or course being recorded in addition to the large accuracy value.

[MattMeyer]

Hi Aaron,

I've attached an export of the "bad" tracks.

We are working on gathering version and device information.

So far, the jump issue has occurred approximately 40 times since the crews deployed on 1/1.

[MattMeyer]

Hello again Aaron,

The original report of multiple devices with this issue was erroneous. The confusion was caused by two different users logging in on the same suspect device.

This issue appears to be limited to a single iPhone 7 running iOS 13.3, (Tracker 19.4.1, Navigator 19.1.0)

All other users are running iOS 13.2.3 without issue. We swapped the suspect device with an iPad running iOS 13.2.3. After the swap the user is tracking as expected.

There may be an issue with Tracker on iOS 13.3

[Anonymous User]

That's good to hear. We haven't been able to reproduce this. If you have a chance, we're curious if you experience the same behavior in other apps like Apple or Google Maps.

[MattMeyer]

Today we had the crew swap back to the suspect device. We are also unable to reproduce the issue at this point. 

Regarding your question about other apps. Apple and Google Maps appeared to be unaffected by the location issue. Navigator was also in use at the time and unaffected.

Since my last update we had an issue with our big data store on our Enterprise install. Perhaps this was somehow related to the suspect device.

The only other thing note worthy is that the crew reported they were signed-in to tracker, with the same user on two devices (iPhone and iPad) I'm not sure if that is even possible or related to the issue.

¯\_(ツ)_/¯