BuddyPress was updated to version 2.5.1, from version 2.5. Changelog:

• Emails: make sure situation taxonomy terms are set up properly, even when the installation still uses shared taxonomy terms (versions of WordPress earlier than 4.4).
• Emails: Increase compatibility with various implementations of PHPMailer/wp_mail().
• Avatars: Add filters and actions to support short-circuiting of standard avatar/cover image uploads/crops.
• Private Messages: Fix problems with autocomplete and the recipient list.
• Post Type Comment Synchronization: Improve internationalization.