Advanced Custom Fields Pro 6.4.0.1

Enhancement - Added PHP validation for the Email field (previously relied solely on browser validation).
Fix - Added support for PHP 8.0 (fixed logged warnings).
Fix - Added support for jQuery 3.5 (fixed logged warnings).
Fix - Fixed bug causing WYSIWYG field to appear unresponsive within the Gutenberg editor.
Fix - Fixed regression preventing "blog_%d" and "site_%d" as valid $post_id values for custom Taxonomy terms.
Fix - Fixed bug causing Radio field label to select first choice.
Fix - Fixed bug preventing preloading blocks that contain multiple parent DOM elements.
i18n - Updated Japanese translation thanks to Ryo Takahashi.
i18n - Updated Portuguese translation thanks to Pedro Mendonça.

* Fix - Fixed bug causing Revision meta to incorrectly update the parent Post meta.
* Fix - Fixed bug breaking "Filter by Post Type" and "Filter by Taxonomy" Field settings.

*Release Date - 29 October 2020*

* Enhancement - Added experiment for preloading block HTML and reducing AJAX requests on page load.
* Fix - Added boolean attribute value detection to JSX parser (fixes issue with templateLock="false").
* Fix - Added "dateTime" attribute to JSX parser ruleset.
* Fix - Fixed unresponsive Select2 instances after duplicating a row or layout.
* Fix - Added missing Color Picker script translations for previous WordPress versions.
* Fix - Fixed bug in Clone Field causing potential PHP error if cloning a Field Group that no longer exists.
* Fix - Fixed PHP warning logged when comparing a revision that contains values for a Field that no longer exist.
* Dev - Added `$wp_block` parameter to block render_callback and render_template (unavailable during AJAX preview requests).
* Dev - Deprecated `acf_get_term_post_id()` function.