Reproduction steps:
1. Create a new “2D URP” project
2. Open Tile Palette window (Window > 2D > Tile Palette)
3. Open the Dropdown by pressing “Create New Tile Palette” button
4. Press the “Create New Tile Palette” option
Actual result: The "Create New Tile Palette" popup appears briefly and then closes immediately
Expected result: The popup opens up
Reproducible with: 6000.3.6f1 (bbb010bdb8a3), 6000.3.19f1, 6000.5.3f1, 6000.6.0b3, 6000.7.0a2
Not reproducible with: 6000.0.79f1, 6000.3.5f1 (a1ec4b2f2d19)
Reproducible on: Ubuntu 24.04.4, Ubuntu 26.04 (user), CachyOS (user)
Not reproducible on: Windows 11