From 2ebb0055bec1fb0af768ec1e07ebafcceccacc26 Mon Sep 17 00:00:00 2001
From: Ryan Cramer <ryan@processwire.com>
Date: Thu, 26 Jan 2023 09:06:33 -0500
Subject: [PATCH] Fix issue processwire/processwire-issues#1669

---
 wire/core/WireArray.php | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/wire/core/WireArray.php b/wire/core/WireArray.php
index b45b3a82..f09035e1 100644
--- a/wire/core/WireArray.php
+++ b/wire/core/WireArray.php
@@ -1607,10 +1607,13 @@ class WireArray extends Wire implements \IteratorAggregate, \ArrayAccess, \Count
 				if(is_array($selector->field)) {
 					$value = array();
 					foreach($selector->field as $field) {
-						$value[] = (string) $this->getItemPropertyValue($item, $field);
+						$v = $this->getItemPropertyValue($item, $field);
+						if(is_array($v)) $v = implode(' ', $this->wire()->sanitizer->flatArray($v));
+						$value[] = (string) $v;
 					}
 				} else {
-					$value = (string) $this->getItemPropertyValue($item, $selector->field);
+					$value = $this->getItemPropertyValue($item, $selector->field);
+					if(is_array($value)) $value = $this->wire()->sanitizer->flatArray($value);
 				}
 				if($not === $selector->matches($value) && isset($this->data[$key])) {
 					$qtyMatch++;