Neo equivalent to craftcms/cms#12983

CHANGELOG.md

@@ -5,6 +5,7 @@
 ### Fixed
 - Fixed a bug when validation errors occurred when editing an element that has more than one Neo field, where some blocks could have multiple add block buttons added
 - Fixed a bug when merging live entry changes into a draft, where newly-created blocks could end up in the wrong places in the draft's block structure
+- Fixed a bug where Neo fields would fail validation if they only contained automatically-added blocks (per the field's Min Blocks setting) and no changes were made to them
 
 ## 3.7.9 - 2023-05-18
 

src/Field.php

@@ -545,6 +545,16 @@ protected function inputHtml(mixed $value, ?ElementInterface $element = null): s
                 $block->useMemoized($value);
             }
 
+            // Explanation: https://github.com/craftcms/cms/blob/4.4.13/src/fields/Matrix.php#L732-L735
+            if (
+                $this->minBlocks != 0 &&
+                count($filteredBlockTypes) === 1 &&
+                (!$element || !$element->hasErrors($this->handle)) &&
+                count($value) < $this->minBlocks
+            ) {
+                $view->setInitialDeltaValue($this->handle, null);
+            }
+
             return $view->renderTemplate('neo/input', [
                 'handle' => $this->handle,
                 'blocks' => $blocks,