Lightroom Classic: When will sync auto upright be fixed ?

What do you mean by "I tried both options independently'? There are three options in the Sync dialog. What you need to do is click on the 'Auto' button in the first image. And then click Sync and only check the 'Upright Mode', not 'Upright Transforms' or 'Transform Adjustments'. And maybe don't sync more than about 100 images in one go. I vaguely remember that there was a bug with very large numbers.

That sounds like a bug. What happens if you first sync lens corrections and then Upright? Doesn't that work?

By the way: if you always use lens corrections anyway, then you can add that to the camera defaults. That way it will be automatically applied to each image on import, so you don't have to sync it at all. Select an image, reset all settings, apply lens corrections and then choose 'Develop - Set Default Settings'. In the dialog that follows click the 'Update to Current Settings' button. Because this is a camera default, you'll have to do this once for each individual camera you use, but not for each lens.

Setting your LR Default Develop settings to apply Lens corrections shouldn't slow down your import. In fact it prevents the need to rebuild the Library Previews when you apply them later after Import.

Does anyone from Lightroom actually step in and help customers ??

Both Johan Elzenga and I are designated 'Champion,' which means we work directly with Adobe Staff who also monitor this forum. I will file a formal bug report with the request to apply Lens Corrections before Transforms when applying Synchronize Settings.

Thank you, but that's not the issue since all files were imported at the same time they all have Process Version 5 assigned. When the Lens Corrections Distortion settings are applied due to syncing with Lens Profile enabled it causes the 'Update' flag to be triggered.
The solution is as I stated above, "Adobe needs to correct this by changing the order in which Transform corrections is applied in Synchronize Settings." Lens Profile needs to be applied BEFORE Transform.

And nobody at Adobe, reads this article? We confirm this problem, it's not serious on their part.
 

Yes they do, but I've already filed a bug report directly to Adobe Engineering. There's no need for them to reply here until an update has been released that fixes this issue.

Thanks Todd for filing the bug. We will investigate.

Regards,
Ganesh

Thank you Ganesh.

It works for me with LR 8.3.1 on Windows 10. You should have only Transform> 'Upright Mode' and 'Process Version' checked and all Lens Corrections settings unchecked.
Please show a screenshot of the Synchronize Settings selector window as below and explain in detail HOW you are applying the Sync Settings and what you are seeing AFTER it has been applied. Thank you.