VFX file gets modified without making changes when saving project

Reproduction steps:
1. Upload the attached project “ModifiedVFXBug” folder to a local repository using the preferred version control application
2. Open the “ModifiedVFXBug” project
3. Save the project File → Save Project
4. Open the version control application and look for changes in files “water.vfx” and “waterima.vfx”

Expected result: There are no changes in files “water.vfx” and “waterima.vfx” after saving project
Actual result: There are several changes in files “water.vfx” and “waterima.vfx” without doing any manual changes

Reproducible with: 8.1.0 (2021.1.0a1), 12.1.8 (2021.3.15f1), 13.1.9 (2022.1.24f1), 14.0.4 (2022.2.1f1), 15.0.2 (2023.1.0a23)
Not reproducible with: 10.10.1 (2020.3.42f1)

Reproducible on: macOS 13.0.1 (Intel)

Notes:

• Couldn't find exact regression because of inconsistent reproduction on older Editor versions
• On 2021.1.0a1 could only reproduce once