drupal_block cache issue - displays previously cached version

Problem/Motivation

We're using drupal_block() to render the page title, but when the page title is updated, it's still rendering the previous title. It seems to be displaying a cached version of the block, and doesn't update until the render cache is cleared.

Steps to reproduce

1. Verify that your render cache is not disabled in a settings.php file with

$settings['cache']['bins']['render'] = 'cache.backend.null';

Comment out that line if necessary.
2. Add this to a twig template such as node--page--full.html.twig:

{{ drupal_block('page_title_block', { label_display: false }) }}

3. You should now have two page titles on the page. (The default one and the one manually rendered in the twig template.)
4. Edit the page and change the page title.
5. View the edited page and note that the default page title has been updated, but the twig title is still showing the previous title.

Proposed resolution

Remaining tasks

User interface changes

API changes

Data model changes