diff --git a/classes/helpers/FrmAppHelper.php b/classes/helpers/FrmAppHelper.php
index fa9234fec0..d2f1351c36 100644
--- a/classes/helpers/FrmAppHelper.php
+++ b/classes/helpers/FrmAppHelper.php
@@ -929,7 +929,7 @@ public static function sanitize_request( $sanitize_method, &$values ) {
 
 		foreach ( $temp_values as $k => $val ) {
 			if ( isset( $sanitize_method[ $k ] ) ) {
-				$values[ $k ] = call_user_func( $sanitize_method[ $k ], $val );
+				$values[ $k ] = is_array( $val ) ? '' : call_user_func( $sanitize_method[ $k ], $val );
 			}
 		}
 	}
diff --git a/classes/models/FrmEntryValidate.php b/classes/models/FrmEntryValidate.php
index 4172b40080..c474f55a9b 100644
--- a/classes/models/FrmEntryValidate.php
+++ b/classes/models/FrmEntryValidate.php
@@ -478,10 +478,10 @@ public static function validate_field_types( &$errors, $posted_field, $value, $a
 	}
 
 	/**
-	 * @param array  $errors
-	 * @param object $field
-	 * @param string $value
-	 * @param array  $args
+	 * @param array        $errors
+	 * @param object       $field
+	 * @param array|string $value
+	 * @param array        $args
 	 *
 	 * @return void
 	 */
@@ -494,7 +494,7 @@ public static function validate_phone_field( &$errors, $field, $value, $args ) {
 
 		$pattern = self::phone_format( $field );
 
-		if ( ! preg_match( $pattern, $value ) ) {
+		if ( is_array( $value ) || ! preg_match( $pattern, $value ) ) {
 			$errors[ 'field' . $args['id'] ] = FrmFieldsHelper::get_error_msg( $field, 'invalid' );
 		}
 	}
diff --git a/tests/phpunit/entries/test_FrmEntryValidate.php b/tests/phpunit/entries/test_FrmEntryValidate.php
index 5a39c3b176..ae38a3d6d1 100644
--- a/tests/phpunit/entries/test_FrmEntryValidate.php
+++ b/tests/phpunit/entries/test_FrmEntryValidate.php
@@ -32,6 +32,23 @@ public function test_validate() {
 		remove_filter( 'frm_validate_entry', $add_a_custom_error );
 	}
 
+	/**
+	 * @covers FrmEntryValidate::validate_phone_field
+	 */
+	public function test_validate_phone_field_rejects_array_value() {
+		$field  = $this->factory->field->create_and_get(
+			array(
+				'type'    => 'phone',
+				'form_id' => $this->factory->form->create(),
+			)
+		);
+		$errors = array();
+
+		FrmEntryValidate::validate_phone_field( $errors, $field, array( 'x' ), array( 'id' => $field->id ) );
+
+		$this->assertArrayHasKey( 'field' . $field->id, $errors );
+	}
+
 	/**
 	 * @since 7.0
 	 *
diff --git a/tests/phpunit/misc/test_FrmAppHelper.php b/tests/phpunit/misc/test_FrmAppHelper.php
index 84d0864862..5e4d6b9085 100644
--- a/tests/phpunit/misc/test_FrmAppHelper.php
+++ b/tests/phpunit/misc/test_FrmAppHelper.php
@@ -251,6 +251,17 @@ public function test_sanitize_request() {
 		$this->assertSame( $values['content'], wp_kses_post( $values['content'] ) );
 	}
 
+	/**
+	 * @covers FrmAppHelper::sanitize_request
+	 */
+	public function test_sanitize_request_ignores_array_value() {
+		$values = array( 'frm_action' => array( 'x' ) );
+
+		FrmAppHelper::sanitize_request( array( 'frm_action' => 'sanitize_title' ), $values );
+
+		$this->assertSame( '', $values['frm_action'] );
+	}
+
 	public function test_kses() {
 		$start_value    = '<script></script><script></script>';
 		$safe_value     = 'Hello, <a href="/test">click here</a>';