Wrong indentation of child input fields when making custom Foldouts in a Property Drawer

Reproduction steps:
1. Open the attached '1425322-sample' project
2. Open the 'SampleScene'
3. Observe the 'GameObject' in the Inspector

Expected result: 'Wait' and 'Time' input fields are aligned to the left side, the same way as the 'Recentring' input field
Actual result: 'Wait' and 'Time' input fields are shifted to the right side

Reproducible with: 2022.2.0a15
Could not test with: 2019.4.39f1, 2020.3.34f1, 2021.3.4f1, 2022.1.2f1 ('No GUI implemented' message shows up in the Inspector)

Reproduced on: macOS 11.6 (Intel)