Release Date - 25 August 2021
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Enhancement - Improved security by running all user-generated content through wp_kses() by default
Enhancement - New ACF Blocks features
* Switched to v2 of the Blocks API for WordPress 5.6+
* Block preloading now enabled by default
* Block preloading now supports blocks set to "Edit" mode
* Add support for full height alignment setting
Enhancement - Added setting to color picker field to enable an opacity slider
Enhancement - Allow deletion of first field group location rule if multiple rules have been added thanks to Arthur Shlain
Fix - Fixed vulnerability with acf_shortcode() where users with subscriber role could view arbitrary ACF data, thanks to Keitaro Yamazaki
Fix - Fixed vulnerability where users with subscriber role could move fields and view field groups, thanks to Keitaro Yamazaki
Fix - Fixed issue where fields in legacy widgets weren't saving in new widget block editor
Fix - Fixed issue with custom field validation in scheduled posts
Fix - Fixed warnings thrown by clone field if the cloned field group is empty
Fix - Fixed issue where Select2 search input wouldn't have focus in WordPress 5.8+
Fix - Fixed issue with Select2 value sorting when Yoast SEO is installed
Fix - Fixed deprecation warnings in block editor in WordPress 5.6+
i18n - Updated Swedish translation thanks to Erik Betshammar