We don't want to filter out false values, only null values.

src/Jobs/ImportItemJob.php

@@ -47,7 +47,7 @@ public function handle(): void
 
                 return [$fieldHandle => $value];
             })
-            ->filter()
+            ->reject(fn ($value) => is_null($value))
             ->all();
 
         match ($this->import->get('destination.type')) {