Bug iPhone SE (2nd Generation) returns 0 for Screen.dpi starting with 2019.4.19f1

We have had several users, all with iPhone SE (2nd generation) running iOS 14.4 report GPS/Location not accurately displaying in our map based game. This issue has only started the last couple days (shortly after iOS 14.4.1 was released). We have not been able to reproduce the issue on other devices as of yet. But we had 3 reports in the last 3 days on different SE devices.

Update:
It may be a rendering issue, because all of our GPS related markers disappear from the map. Only on SE 2nd Generation.

 

@Petras-Unity We have been able to troubleshoot a little more. We believe it is something to do with rendering. We narrowed down to when we updated from 2019.4.5f1 to 2019.4.21f1. After updating to .21, all our map markers don't appear for iPhone SE 2nd gen.

 

@Petras-Unity I am unsure if other devices are affected. From the devices we have tested, only the iPhone SE 2nd gen experiences the issue. Our map is a quad and the map markers are on a 3D canvas. Both the canvas and quad share the same material, which is using the Unlit/Texture shader. Render Queue is set to Geometry 2000. The markers do not have a material set. We are using URP 7.5.3.

 

@Petras-Unity I don't know if I will be able to submit a bug report with a small project. Our app is really big and requires networking and addressables to be uploaded for the app be fully functional. However we do have cloud builds set up...

 

Devices we've tried so far that work fine: iPhone XR, iPhone XS Max, Pixel 3XL, Nexus 5X, iPad Mini 4, iPhone 7, and iPhone 11 Pro Max. All of these have no issue with these same markers except for the SE.

 

@Petras-Unity We have tested:
iPhone 7
iPad A1673
iPhone XR
iPhone XS Max
iPhone SE 2nd Gen.
Pixel XL 3
Nexus 5x
Samsung S9
Samsung Note 9

 

@Petras-Unity Unity 2019.4.18 seems to work fine, haven't been able to try 2019.4.19 but I can confirm it does not work in 2019.4.20.

 

@Petras-Unity we are trying to create a simple project to reproduce the issue but we are currently only able to reproduce it in the main project. We have tried changing 3D Canvas Materials to URP Unlit, setting to Transparent, having separate materials on the quad and the markers, and changing their render queue, but none of those attempts have fixed the issue. We are currently making a cloud build for .19. We tried: 2019.4.5, .6, .8, .10, .12, .14, .16, .18 which all work fine. .20 and .21 all have the broken map markers.

 

2019.4.19 appears to be the version that it breaks

 

@Petras-Unity Screen.dpi started to return 0 for SE 2nd Edition devices starting with 2019.4.19. We don't know if other devices also started returning 0.

Could it be something related with this fix? https://issuetracker.unity3d.com/is...ation-returns-deviceunknown-with-some-devices

 

@Petras-Unity just to be clear, that was the issue. Screen.dpi is returning 0 so our algorithm scaled UI elements to 0 as a result. We have since put in a failsafe to have a minimum default value, but I am wondering why 2019.4.19 changed to throw a 0 for the Screen.dpi value. Will Unity be resolving that issue, or is it always something we will have to check for?

 

@Petras-Unity when we tried .23 it gave as a bunch of other unrelated issues so we can't test if that solution worked. I don't know when we will look into resolving the issues we experienced with .23.

 

For now we've just set some defaults to ensure the markers are at least appearing though they may not size properly in all devices that return 0.