Hi, I just experienced a similar problem and a redirect loop after logging in to wp-admin. I figured out the root cause, and thought that putting some notes here might be helpful:
Recently, both woocommerce-delivery-notes and woocommerce-abandoned-cart were updated. Both plugins want to redirect to a welcome page after updating, but the code for each attempts to intercept the GET request for the other’s page and substitute its own. Again and again.
Might be better to just check that there is no page parameter before the welcome action:
if ( !isset( $_GET[ 'page' ] ) {
add_action( 'admin_init', array( $this, 'welcome' ) );
}
Looks like both plugins are authored by the same person/team, as they both have the same problem.
