Photoshop 27.10 becomes progressively slower during normal use, with severe Brush lag and masked adjustment layers blinking in and out

Hi ​@Ana34954096ida0,

Thank you for the detailed report and especially for testing the same workflow after downgrading to Photoshop 27.9.1. The fact that the Brush performance returns to normal and Photoshop remains responsive in 27.9.1, while you’re seeing the slowdown in both 27.10 and Beta 27.11, is useful information.
 

We’d like to investigate this further with the Photoshop product team. If possible, could you please provide:

• A screen recording showing the workflow from when Photoshop is responsive through to the point where the Brush becomes noticeably delayed, and the masked adjustment layers begin blinking.

• A sample PSD/PSB that reliably reproduces the behavior. Ideally, please keep the layer structure, adjustment layers, and masks intact so we can test the same workflow.

• Help > System Info > Copy from Photoshop 27.10 and paste the contents here.

• If you can estimate it, approximately how long you need to work in the document before the slowdown begins, and whether closing and reopening the document restores performance, or whether Photoshop itself needs to be restarted.

Since the Brush is particularly affected, please tell us more about your input setup:

• Are you painting with a graphics tablet/pen, mouse, or the MacBook trackpad?

• If you’re using a tablet, what make/model is it (Wacom, Huion, XP-Pen, etc.)?

• What tablet driver version is installed?

• Does the Brush lag still occur if you disconnect the tablet and test the same document using only the MacBook trackpad or a mouse?

• Are you using a standard Photoshop brush or a custom/imported brush when the slowdown occurs?

If the project contains private/client material or is too large to attach publicly, you can upload the recording and sample file to Google Drive, Dropbox, WeTransfer, or a similar service and send me the link via DM.

Since you’ve already isolated a version difference between 27.9.1 and 27.10/27.11 beta, please preserve the affected sample rather than flattening it or rebuilding the document. Having a file that reproduces both the progressive Brush lag and the adjustment-layer rendering issue will give us the best chance of reproducing it and logging a targeted bug with the product team.

Thanks again for taking the time to test the previous release.

Best,

Anshul Saini