How to reproduce:
1. Open the attached project "case_1374782.zip"
2. Open Scene "SampleScene"
3. In the Hierarchy window drag "inner" GameObject into the "Canvas" GameObject
4. In the Inspector, under "Rect Transform" choose center-middle Anchor Preset
5. Disable and enable the "Canvas" GameObject
Expected result: the "inner" GameObject Rect Transform is the same as from before the enable/disable and the Anchor Preset is center-middle
Actual result: the "inner" GameObject Rect Transform is different and the Anchor Preset is set back to left-bottom
Reproducible with: 2019.4.32f1, 2020.3.22f1, 2021.1.28f1, 2021.2.1f1, 2022.1.0a14