Version 4.3.6

system/Helpers/Form/Matrix.php

@@ -248,7 +248,14 @@ class _Matrix extends \IPS\Helpers\Form
 							{
 								if( is_array( $inputValue ) AND isset( $inputValue[ $newId ] ) )
 								{
-									$data = array_merge( $data, $inputValue[ $newId ] );
+									/* @note This previously used an array_merge() however this was causing elements to be overwritten with a blank value in some cases */
+									foreach( $inputValue[ $newId ] AS $key => $value )
+									{
+										if ( $value )
+										{
+											$data[ $key ] = $value;
+										}
+									}
 								}
 							}
 						}