Lightroom Mobile: Smart Previews with transparency show gray instead of white until sent to Edit and back

Lightroom iOS 5.0 was released earlier today and contained a fix for this issue. Please update and let us know if you are still seeing the issue. 

Thank you for your patience. 

Strange. My original title from the other forum was "Lightroom sync and PSD files with mask". Don't know where this title came from.

I don't see the issue on LR Desktop, just LR Mobile / IOS. 

The issue is unrelated to smart previews and pinch-zoom. A more accurate topic title would be "Transparent pixels on LR Mobile / IOS show as grey."

Recipe:

1. Add this image to LR Desktop and observe it displays as all white, in both grid and detail views:
https://www.dropbox.com/s/aah9axe1axoykxv/transparent-2019-06-20.png?dl=0

2. Wait until it syncs to LR Mobile and then wait 10 more seconds.

3. In LR Mobile, tap on the photo.  About half the time it appears with the transparent pixels as grey, the rest of the time as white:

This issue appears to be limited to iOS. I am not seeing the behavior on Lightroom Desktop or Lightroom Android.  Is anyone here seeing this issue on Android or Desktop?

The same symptoms occur when I add the PNG to my LR Desktop (instead of LR Classic), wait for it to sync to LR Mobile, and then view the full image.  And the transparent pixels turn from grey to white when I go back to grid view and then full-image view again.

So the problem is independent of the smart previews created by LR Classic.

It's important to use the correct app names here, because that does make a huge difference. The PSD was imported into Lightroom Classic, and so it's uploaded as a smart preview, not as original (what Lightroom would do). I know because I'm one of the people in the user forum who tried this (with this particular file, supplied by John) and confirmed it.

The file started as a DNG imported into LR.  I chose to edit in PS from within LR. After manipulating and saving in PS, it automatically showed as a PSD in the LR catalog without having to import.

I then synced the file to mobile.

Yes, it says Smart Preview.

Thank you. 

The file in question on your mobile device, from you example, is a Smart Preview of a PSD file that is loaded into a Lightroom Classic catalog and not a PSD that was imported to the Lightroom Ecosystem (Desktop, Mobile or Web)? 

If you go to the file in your Mobile app and bring it into full view and tap "Info" in the upper left pulldown.  Directly under the 5 stars, does it say Smart Preview? 

iOS 12.3.1
LR Mobile: 4.3.1
LR Classic: 8.3.1

Lightroom Mobile Version NUMBER?
iOS Version NUMBER?

We have many people come to the forum believing they are on the latest version. I need to confirm your version number.

Thank you for confirming iOS.