My Site: Site title changes through Site Settings not respected on My Site screen

[lmischner]

Expected:
Regardless of whether the user changes the site title via Site Settings or by tapping the site title on the main My Site screen, the My Site screen should reflect the changed title.

Actual:
If the user changes the site title via Site Settings, that change is not reflected on the My Site screen.

sitetitle.mov

Steps to reproduce:

1. From My Site screen, go to Site Settings
2. Enter new name
3. Go back to My Site screen
4. Note original name is still used (both as a part of navigation title if you scroll down and in the site name space at the very top of the screen)
5. Tap site name
6. Note the entry field shows new name you entered in Site Settings
7. Save – change is not reflected.
8. Tap site name again and enter a 3rd name
9. Save
10. Note that now the 3rd site name is shown

Tested on iPhone XS, iOS 15.4.1, WPiOS 19.7.0.2