How to reproduce:
1. Open user's project "Splines.zip"
2. Select the Knot Placement tool from Editor tools
3. Move any knot of the "Spline" GameObject
4. Undo

Expected result: Spline's mesh follows the spline's shape after the undo
Actual result: Spline's mesh doesn't update together with the spline

Reproducible with: 1.0.0-pre.9 (2021.2.12f1, 2022.1.0b8, 2022.2.0a5)
Could not test with: 1.0.0-pre.8 (2019.4.25f1, 2020.3.29f1) Spline Package code errors in console

Note: Moving a knot after undo snaps the mesh to the knot