v3.1.9

• Fix disabled "Save" button in widgets (#801 - props @Panchev)
• Style enhancements

v3.1.8

• Fix conditional logic errors caused by the sorting of complex fields. (#780)

v3.1.7

• Fix broken block registration in WordPress 5.3. (#779, #785)

v3.1.6

• Fix errors when a complex group with conditional logic is deleted. (#738)

v3.1.5

• Fix bug introduced in v3.1.4 (#767) props @elvishp2006

v3.1.4

• Fix JavaScript error on oEmbed field (#655, #765) props @Panchev
• Fix Media Gallery loading less attachments (#665, #688, #764) props @emandiev
• Change SQL query escaping on LIKE statement (#744, #745) props @elvishp2006

v3.1.3

• Added Russian translations.
• Fixed errors Media Gallery field when the thumbnail size isn't presented. (#743)

v3.1.2

• Fixed missing wp-polyfill dependency in certain environments(e.g WPEngine).
• Fixed JS errors in the association field caused by missing edit link.

v3.1.1

• Fixed hierarchy resolving logic in association field. (#636, #703) props @joeyblake
• Fixed initial fetching of selected options in association field.
• Fixed minor layout issues in association field.

v3.1.0

• Added support for nested blocks 🎉 . See the documentation for more details.
• Added registerContainerType & getContainerType to public API of metaboxes package.
• Added support for alpha transparency to color field. (#648)
• Fixed incorrect URL of edit link in association field. (#662)
• Fixed loading of paginated results in association field.
• Fixed layout of association field when the items have very long titles.
• Fixed missing the block attributes in render callback. (#642)
• Fixed locked "Update" button caused by required fields in hidden containers. (#653, #693)
• Fixed interoperability between default and '' values in post_template condition.
• Removed usage of _wpLoadGutenbergEditor variable.