diff --git a/web_interface/blueprints/api_v3.py b/web_interface/blueprints/api_v3.py
index de16d59e..25e9a7ce 100644
--- a/web_interface/blueprints/api_v3.py
+++ b/web_interface/blueprints/api_v3.py
@@ -3335,7 +3335,33 @@ def save_plugin_config():
             # Form fields can use dot notation for nested values (e.g., "transition.type")
             form_data = request.form.to_dict()
 
-            # First pass: detect and combine array index fields (e.g., "text_color.0", "text_color.1" -> "text_color" as array)
+            # First pass: handle bracket notation array fields (e.g., "field_name[]" from checkbox-group)
+            # These fields use getlist() to preserve all values, then replace in form_data
+            bracket_array_fields = {}  # Maps base field path to list of values
+            for key in request.form.keys():
+                # Check if key ends with "[]" (bracket notation for array fields)
+                if key.endswith('[]'):
+                    base_path = key[:-2]  # Remove "[]" suffix
+                    values = request.form.getlist(key)
+                    if values:
+                        bracket_array_fields[base_path] = values
+                        # Remove the bracket notation key from form_data if present
+                        if key in form_data:
+                            del form_data[key]
+            
+            # Process bracket notation fields and add to form_data as comma-separated strings
+            for base_path, values in bracket_array_fields.items():
+                # Get schema property to verify it's an array
+                base_prop = _get_schema_property(schema, base_path)
+                if base_prop and base_prop.get('type') == 'array':
+                    # Combine values into comma-separated string for consistent parsing
+                    combined_value = ', '.join(str(v) for v in values if v)
+                    form_data[base_path] = combined_value
+                    import logging
+                    logger = logging.getLogger(__name__)
+                    logger.debug(f"Processed bracket notation array field {base_path}: {values} -> {combined_value}")
+
+            # Second pass: detect and combine array index fields (e.g., "text_color.0", "text_color.1" -> "text_color" as array)
             # This handles cases where forms send array fields as indexed inputs
             array_fields = {}  # Maps base field path to list of (index, value) tuples
             processed_keys = set()
diff --git a/web_interface/static/v3/plugins_manager.js b/web_interface/static/v3/plugins_manager.js
index 74b3e6a0..7cf6337e 100644
--- a/web_interface/static/v3/plugins_manager.js
+++ b/web_interface/static/v3/plugins_manager.js
@@ -6467,8 +6467,9 @@ window.updateImageScheduleDay = function(fieldId, imageId, imageIdx, day) {
     window.updateImageList(fieldId, currentImages);
 }
 
-// Expose renderArrayObjectItem to window for use by window.addArrayObjectItem
+// Expose renderArrayObjectItem and getSchemaProperty to window for use by global functions
 window.renderArrayObjectItem = renderArrayObjectItem;
+window.getSchemaProperty = getSchemaProperty;
 
 })(); // End IIFE
 
@@ -6491,7 +6492,7 @@ if (typeof window !== 'undefined') {
         if (!schema) return;
         
         // Use getSchemaProperty to properly handle nested schemas (e.g., news.custom_feeds)
-        const arraySchema = getSchemaProperty(schema, fullKey);
+        const arraySchema = window.getSchemaProperty(schema, fullKey);
         if (!arraySchema || arraySchema.type !== 'array' || !arraySchema.items) {
             return;
         }
diff --git a/web_interface/templates/v3/partials/plugin_config.html b/web_interface/templates/v3/partials/plugin_config.html
index 687ac55d..516089f2 100644
--- a/web_interface/templates/v3/partials/plugin_config.html
+++ b/web_interface/templates/v3/partials/plugin_config.html
@@ -232,10 +232,13 @@
                                                        id="{{ field_id }}_logo_{{ item_index }}"
                                                        accept="image/png,image/jpeg,image/bmp,image/gif"
                                                        style="display: none;"
-                                                       onchange="handleCustomFeedLogoUpload(event, '{{ field_id }}', {{ item_index }}, '{{ plugin_id }}', '{{ full_key }}')">
+                                                       disabled
+                                                       aria-disabled="true">
                                                 <button type="button" 
-                                                        onclick="document.getElementById('{{ field_id }}_logo_{{ item_index }}').click()"
-                                                        class="px-2 py-1 text-xs bg-gray-200 hover:bg-gray-300 rounded">
+                                                        disabled
+                                                        aria-disabled="true"
+                                                        class="px-2 py-1 text-xs bg-gray-200 text-gray-400 rounded cursor-not-allowed opacity-50"
+                                                        title="Logo upload for custom feeds is not yet implemented">
                                                     <i class="fas fa-upload mr-1"></i> Upload
                                                 </button>
                                                 {% if logo_path %}