Cannot override content field block title

Steps to reproduce :
- Enable Layout Builder module
- Go to Structure > Content types > Basic page
- Check "Use Layout Builder", Save
- Click "Manage layout"
- Configure Body block (or add any "Content fields" block)
- Change title text
- Check "Display title"
- Save ("Update" or "Add block")

The original block title is displayed instead of the one set in the title field.

It works for non "content fields" blocks (Like Content > Links)