Description: Since updating to Tahoe, the file picker dialog briefly flickers immediately after opening in my document-based app. This behavior did not occur on macOS Sequoia.
Rhe issue does not appear in TextEdit, but it does occur in Paper (a writing app) and Kaleidoscope. Based on this, it seems to affect third-party document-based apps that use standard open panels.
Steps to Reproduce: 1. Launch a third-party document-based app. 2. Open the file picker (e.g., via “Open…”). 3. Observe a brief flicker as the dialog appears.
Expected Result: The file picker dialog should open smoothly without flickering.
Actual Result: The file picker dialog flickers briefly right after appearing.
Notes: • Issue introduced in macOS Tahoe. • Not reproducible in macOS Sequoia.
Reported through Feedback Assistant: FB20522119