Clean local install - WP 5.9, Pro 5.2.0 B1
Conerstone > Settings. The save or update button text is does not render, though beleive the settings are still saved.
<div class="tco-box-content">
<p>Once you are satisfied with your settings, click the button below to save them.</p>
<button class="tco-btn tco-btn-block"></button>
</div>
Brower console has following error:
react.js?ver=17.0.1:245
Warning: Each child in a list should have a unique "key" prop.
Check the render method of `gn`. See https://reactjs.org/link/warning-keys for more information.
at div
at gn (http://localhost/wp-content/themes/pro/cornerstone/assets/js/admin.d6a47ec.js:1:25671)
Also, after disabling all deprecated elements they all still in the elements list of the builders.