Sto provando a segnalare un bug di lightroom, ma anche la pagina della segnalazione mi si blocca

Moderators, ​@Sameer K, please merge with this existing bug report:

https://community.adobe.com/bug-reports-674/p-syncing-develop-settings-to-a-large-batch-of-photos-can-wipe-out-the-previous-settings-of-a-batch-663817?postid=7160733#post7160733

Also, please unlock that thread, since it’s an unresolved bug report and others should be able to contribute to it.

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i did apply auto and then copied only two settings (contrast and blacks) to all pics, with both copy/paste and sync

You’re tripping over an old bug that was never fixed:

https://community.adobe.com/bug-reports-674/p-syncing-develop-settings-to-a-large-batch-of-photos-can-wipe-out-the-previous-settings-of-a-batch-663817

There have been a few reports about these symptoms in the last couple of months.

Try this workaround for applying Auto to a batch of photos:

1. In Library Grid view, select the desired photos.

2. In the Quick Develop panel, click Auto.

3. Do the menu command Library > Previews > Build Standard Sized Prevews and wait for it to complete.

4. Now sync or auto-sync additional develop settings to those photos, and the settings computed by Auto shouldn’t be erased.

Version

Did you first apply Auto Settings to the photos before syncing the basic setting?

It would be very helpful if you told us the version NUMBER of your Lightroom Classic. Words like “latest version” mean different things to different people, which is why we need the version NUMBER.

I suggest you show us a video capture your Lightroom Classic so we can see this happening for ourselves. We need a video of the entire full screen, nothing chopped off. It should not be a cell-phone video capture either. On Windows, there are a number of programs that can make this video capture, such as the built in Snipping Tool.