Fix section fields incorrectly merging into the previous row after reload

classes/helpers/FrmFieldGridHelper.php

@@ -60,6 +60,24 @@ class FrmFieldGridHelper {
 	 */
 	private $section_is_open = false;
 
+	/**
+	 * True if the first field in the row had frm_first, indicating an intentional group.
+	 *
+	 * Example: Two fields grouped in one row.
+	 * - First field has frm_first → is_group_start = true.
+	 * - Second field has no frm_first, but is_group_start is true → stays in the same row.
+	 *
+	 * @var bool
+	 */
+	private $is_group_start = false;
+
+	/**
+	 * True if the first field in the row was a section (divider).
+	 *
+	 * @var bool
+	 */
+	private $is_section_start = false;
+
 	/**
 	 * @param bool $nested
 	 */
@@ -155,14 +173,27 @@ public function maybe_begin_field_wrapper() {
 	 * @return bool
 	 */
 	private function should_first_close_the_active_field_wrapper() {
-		if ( false === $this->parent_li || ! empty( $this->section_helper ) ) {
+		if ( false === $this->parent_li ) {
+			return false;
+		}
+
+		// Handle sections (dividers) before section_helper check.
+		// section_helper is created in set_field() before this runs.
+		// @see https://github.com/Strategy11/formidable-pro/issues/3820
+		if ( 'divider' === $this->field->type && ! $this->section_is_open ) {
+			return $this->current_list_size + $this->section_size > 12 || $this->is_frm_first || ! $this->is_group_start;
+		}
+
+		// When a section is open, let section_helper handle field grouping.
+		if ( ! empty( $this->section_helper ) ) {
 			return false;
 		}
 
 		if ( 'end_divider' === $this->field->type ) {
 			return false;
 		}
-		return ! $this->can_support_current_layout() || $this->is_frm_first;
+
+		return ! $this->can_support_current_layout() || $this->is_frm_first || ( $this->is_section_start && ! $this->is_group_start );
 	}
 
 	/**
@@ -173,6 +204,8 @@ private function begin_field_wrapper() {
 		$this->parent_li           = true;
 		$this->current_list_size   = 0;
 		$this->current_field_count = 0;
+		$this->is_group_start      = $this->is_frm_first;
+		$this->is_section_start    = 'divider' === $this->field->type;
 	}
 
 	/**