P: using arrow keys to navigate through images an image gets merged with the last one

I thought I was going crazy, but yeah, I had this on multiple photos today as well. It wasn’t just masks for me, but also crops and healing/cloning.

Similar issue on windows where if you're adjusting AI denoise levels while switching back and forth between photos, sometimes a photo's Denoise layer will get applied to a different photo, creating what looks like a double exposure effect

Same thing is happening to me on MacBook Pro m4 max! Happens both on cloud photos and local photos. It also transfers remove-stuff, like healing and cloning. It really sucks with local files, because it basically deletes the actual edit. It can only be reversed by manual resetting or by ctrl-z back past the specific moment it happened. 

While editing photos in Lightroom (cloud version), I am experiencing an issue where adjustments - including masks - are unexpectedly applied to other images.

The problem occurs during normal editing: I edit one photo, then switch to another, and notice that adjustments from the previous image have appeared there, even though I did not copy or apply them.

This has been happening frequently over the past few days and disrupts the editing process, as changes appear on photos where they were not intended.

Steps to reproduce:

1. Open Lightroom (cloud version)
2. Edit a photo (including masks)
3. Switch to another photo
4. Continue working normally
5. Observe that edits from a different photo may appear

Expected behavior:
Edits and masks should only appear on the photo where they were made, unless manually applied.

Actual behavior:
Edits and masks sometimes appear on other photos without any user action.

Frequency:
Occurs frequently.

System information:

• Lightroom version: 9.3 (arm64)
• OS: macOS 26.3.1
• Device: MacBook Air (Apple M2)
• RAM: ~8 GB available
• GPU: Apple M2 (Metal)

Additional notes:

• The issue affects both general adjustments and masks
• Happens during normal editing and navigation between photos
• Makes the editing process unreliable

Attachments:
Screenshots showing edits and masks appearing on unintended photos

Hi ​@plaiditude, thanks for reaching out! To better help you with this issue, we would like a few more details. Can you send your system info and a screen recording of your issue? You can find your system info by going to Help > System Info, copying and pasting it into a text file, and attaching it here. Do you see any other patterns that might help replicate the issue? 

In the meantime, I would recommend trying these basic troubleshooting steps if you haven’t already:

1. Check for Updates: Ensure that Lightroom is updated to the latest version. Sometimes, performance issues are resolved in newer updates.

2. System Check: Monitor the system performance when using Lightroom. Closing other applications may help free up resources.
3. Reset your Lightroom preferences: https://adobe.ly/4o7JADQ

If none of these steps work, please send us the information you requested, and we will continue troubleshooting. I hope this helps! ^CH