Reproduction steps:

1. Open the attached project “ReproProject“
2. Open the scene “SimpleDemo_UsingPlayerInput“
3. In the Hierarchy window, select “Player“ GameObject
4. In the Inspector window, in the “Player Input“ component, double click on the “SimpleControls” asset
5. In the opened Action Editor window, expand “fire“ action, select PrimaryAction binding
6. In the Binding Properties sidebar that appeared on the right, try to click on left side of “Path“ dropdown to open it
7. Observe the result

Expected result: “Path” dropdown expands no matter which side of its dropdown button you click
Actual result: “Path” dropdown expands only when clicked on approximately the rightmost side of the dropdown

Reproducible in: 1.8.0-pre.2(2022.3.47f1), 1.11.2 (2022.3.55f1, 6000.0.33f1, 6000.1.0a10)
Not reproducible in: 1.8.0-pre.1 (2021.3.47f1, 2022.3.47f1), 1.8.0-pre.2(2021.3.47f1), 1.11.2 (2021.3.47f1)

Reproducible on: macOS 15.2 (M1 Pro) Windows 11
Not reproducible on: No other environments tested

Note:

• The behaviour is a little bit different when reproducing on a mac. When having editor opened on a screen with resolution of 1512x982, the issue does not reproduce but reproduces when Editor is open on a screen with resolution of 2560x1440. When reproducing on windows machine, this issue reproduces on any screen size
• When trying to resize Binding Properties sidebar, the clickable area of the dropdown button tries to expand with the size of the button but fails to cover the whole button, in that case, the button’s clickable area is covering the dropdown button approximately till the center