Reconstruct formatting at PLAINTEXT (wrong), ignore PLAINTEXT in SELECT

Author: dmsnell

src/wp-includes/html-api/class-wp-html-processor.php

@@ -2122,6 +2122,8 @@ private function step_in_body(): bool {
 					$this->close_a_p_element();
 				}
 
+				$this->reconstruct_active_formatting_elements();
+
 				$this->insert_html_element( $this->state->current_token );
 				return true;
 
@@ -2222,6 +2224,7 @@ private function step_in_body(): bool {
 					}
 
 					$this->state->stack_of_open_elements->remove_node( $node );
+					return true;
 				} else {
 					/*
 					 * > If the stack of open elements does not have a form element in scope,
@@ -2243,7 +2246,6 @@ private function step_in_body(): bool {
 					$this->state->stack_of_open_elements->pop_until( 'FORM' );
 					return true;
 				}
-				break;
 
 			/*
 			 * > An end tag whose tag name is "p"

src/wp-includes/html-api/class-wp-html-tag-processor.php

@@ -975,6 +975,10 @@ private function base_class_next_token(): bool {
 		}
 
 		if ( 'PLAINTEXT' === $tag_name ) {
+			if ( WP_HTML_Processor_State::INSERTION_MODE_IN_SELECT === ( $this->insertion_mode ?? null ) ) {
+				return true;
+			}
+
 			$doc_length                 = strlen( $this->html );
 			$this->text_starts_at       = $this->token_starts_at + $this->token_length;
 			$this->text_length          = $doc_length - $this->text_starts_at;