Issue #3460927: Fixed blank space issues.

Closes #3460927

src/Plugin/Validation/Constraint/RequireOnPublishValidator.php

@@ -97,6 +97,10 @@ class RequireOnPublishValidator extends ConstraintValidator implements Container
         continue;
       }
 
+      if (!$field_config->getThirdPartySetting('require_on_publish', 'require_on_publish', FALSE)) {
+        continue;
+      }
+
       if ($field_config->getType() === 'boolean') {
         $field_name = $field->getName();
         $value = $entity->get($field_name)->value;
@@ -104,11 +108,19 @@ class RequireOnPublishValidator extends ConstraintValidator implements Container
           continue;
         }
       }
-      elseif (!$field->isEmpty()) {
-        continue;
+      elseif (in_array($field_config->getType(), ['text', 'string_long', 'string'])) {
+        $field_name = $field->getName();
+        $hasValue = !$entity->get($field_name)->isEmpty();
+        foreach ($entity->get($field_name)->getValue() as $item) {
+          if (is_null($item['value']) || empty(trim($item['value']))) {
+            $hasValue = FALSE;
+          }
+        }
+        if ($hasValue) {
+          continue;
+        }
       }
-
-      if (!$field_config->getThirdPartySetting('require_on_publish', 'require_on_publish', FALSE)) {
+      elseif (!$field->isEmpty()) {
         continue;
       }