Rename of page should be blocked when name strategy validation is enabled and not complied with

It reproduces with the standard "Preformatted names" strategy, with or without the Randomly generated unique names extension installed:

I did the following steps to reproduce the issue with the "Preformatted names", with an Advanced user:
1. Selected the Preformatted names without special characters as a Name strategy , Transform names automatically - Enabled, Validate names before saving - Enabled
2. I created a page with the name Test*&6A and the saved name was Test-6A. It respected the chosen name strategy.
3. I renamed the page by expanding the New location and replacing the Name field from Test-6A into Test-6A&*
Expected result: a name respecting the name strategy
Actual result: Test-6A%26*, thus the name strategy was not kept.