Adding a verification of obj value if not an array so we don't try to use push on a empty string

CHANGELOG.md

@@ -11,6 +11,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 - Fix text area fields size and alignment
 - Optimize container loading when there are a large number of entities
+- Adding a verification in refreshContainer function for obj value which can be an empty string instead of an array
 
 ## [1.24.0] - 2026-04-16
 

inc/field.class.php

@@ -1011,7 +1011,7 @@ function(obj, item) {
                         var multiple_matches = item.name.match(/^(.+)\[\]$/);
                         if (multiple_matches) {
                             var name = multiple_matches[1];
-                            if (!(name in obj)) {
+                            if (!(name in obj) || obj[name] == "") {
                                 obj[name] = [];
                             }
                             obj[name].push(item.value);