Mask won’t stay in place in Lightroom

Are you using GPU acceleration ?

Because I started a thread and found my own solution to masks moving when the image is rotated from its original "as shot" orientation ... and also that applying them when you've rotated an image draws, live on screen, in the incorrectly roatated area....

Which is directly related to NOT having GPU acceleration enabled in preferences.
If you can check, see if you have GPU acceleration enabled and try to repeat the issue?

This was my thread: There is a video too....

https://community.adobe.com/t5/lightroom-classic-bugs/p-remove-brush-strokes-appear-in-the-wrong-place-on-rotated-images/idc-p/14735483#M55412

AND I would have expected Adobe to have picked up on this by now.... as others have reported this issue.
I started experiencing it when I updated from v13.2 > v13.4

-T

If you have several images highlighted and you have AutoSync active, then anything done to any one of the images is applied immediately to all of the images. But there are some issues especially around differing rotation / orientation, that can give unexpected results with the syncing of masks betweeen images.

It is fine to apply global adjustments across a whole batch of images (and it will not matter which one of these happens to be the active image at a given moment, since all will receive the same adjustments together).

It is usually OK to batch invoke a Sky or Subject auto-selection, which will be analysed and implemented separately in the case of each picture, and then apply whatever local adjustment you have stipulated. 

But when it comes to localised mask selection e.g. with the brush, you may want to do this individually per image. Of course you can apply a number of different masked adjustments across a batch of photos working from one sample image; but accept that the location and extent of the brushing on a mask, or the positioning of a gradient filter, within the other photos - may need to be individually re-done. To switch to individual editing per photo you would either need to NOT have other images than that highlighted at the same time; or more radically, to turn AutoSync mode off. That is done at lower right of Develop (the button only appears when multiple images are selected, and when only one is, the whole thing is moot).

I do not think the following will just scream out OH that's the issue!!, but...

Please post your System Information as Lightroom Classic (LrC) reports it. In LrC click on Help, then System Info, then Copy. Paste that information into a reply. Please present all information from first line down to and including Plug-in Info. Info after Plug-in info can be cut out as that is just so much dead space to us non-Techs and it takes up vast amounts of scroll space making the reply less readable and less likely that others will bother with your post.

example:

Lightroom Classic version: 13.4
License: Creative Cloud
Language setting: en
Operating system: Windows 11 - Home Premium Edition
Version: 11.0.22631
Application architecture: x64
System architecture: x64
Logical processor count: 32
Processor speed: 2.9GHz
SqLite Version: 3.36.0
CPU Utilisation: 0.0%
Power Source: Plugged In, 255%
Built-in memory: 65243.7 MB
Dedicated GPU memory used by Lightroom: 3498.4MB / 8018.0MB (43%)
Real memory available to Lightroom: 65243.7 MB
Real memory used by Lightroom: 5230.0 MB (8.0%)
Virtual memory used by Lightroom: 10060.3 MB
GDI objects count: 1216
USER objects count: 3454
Process handles count: 3424
Memory cache size: 0.0MB
Internal Camera Raw version: 16.4 [ 1897 ]
Maximum thread count used by Camera Raw: 5
Camera Raw SIMD optimization: SSE2,AVX,AVX2
Camera Raw virtual memory: 2038MB / 32621MB (6%)
Camera Raw real memory: 1352MB / 65243MB (2%)

Cache1:
NT- RAM:0.0MB, VRAM:0.0MB, Combined:0.0MB

Cache2:
m:0.0MB, n:0.0MB

U-main: 139.0MB

System DPI setting: 96 DPI
Desktop composition enabled: Yes
Standard Preview Size: 2560 pixels
Displays: 1) 2560x1440
Input types: Multitouch: No, Integrated touch: No, Integrated pen: Yes, External touch: No, External pen: No, Keyboard: No

Graphics Processor Info:
DirectX: NVIDIA GeForce RTX 3070 (32.0.15.5599)
Init State: GPU for Export supported by default
User Preference: Auto

Application folder: C:\Program Files\Adobe\Adobe Lightroom Classic
Library Path: W:\Active Projects\Photography\test\test-v13-3.lrcat
Settings Folder: C:\Users\DavidsLocal\AppData\Roaming\Adobe\Lightroom

Installed Plugins:
1) AdobeStock
2) jf Bag-o-Goodies
3) Loupedeck2
4) Nik 7 HDR Efex
5) SmugMug

Please find below a link to a video capture I accomplished on my rig where I am attempting to repeat your issue. But it works on my rig.

https://www.dropbox.com/scl/fi/dl3fiuwy0sbkd6n91ous5/mask.mp4?rlkey=7p9ip1zjgkambandr37t03qai&st=6g6bbqbr&dl=0

hmm, I had my pins off, my bad, but not the issue

oh, and I see is was not exactly correct about using the insert video button, it is too too picky about sources, so I just pasted in the link. My bad

with a mask using the brush over one area to lighten up the area by increasing the exposure. When I go back the mask has moved. What am I doing wrong?

1. What type of mask? Perhaps one of the AI masks. For example the Sky Mask?

2. Can you post a video capture of your workflow. (and save/share the video in the cloud, perhaps DropBox)

Hey,Nikki33602348ry2y! Welcome to Lightroom Community. 

I'll need more details to help you. 

1. What version of Lightroom and Windows are you using?

2. What type of file are you working/editing on? 

3. Where is your catalog stored on an internal/external drive? 

4. From where you're importing images to Lightroom? 

Regards, 

Shivani