diff --git a/src/Plugin/Field/FieldWidget/InlineParagraphsWidget.php b/src/Plugin/Field/FieldWidget/InlineParagraphsWidget.php
index ce8d108..a25749b 100644
--- a/src/Plugin/Field/FieldWidget/InlineParagraphsWidget.php
+++ b/src/Plugin/Field/FieldWidget/InlineParagraphsWidget.php
@@ -643,7 +643,12 @@ class InlineParagraphsWidget extends WidgetBase {
         ];
 
         field_group_attach_groups($element['subform'], $context);
-        $element['subform']['#pre_render'][] = 'field_group_form_pre_render';
+        if (function_exists('field_group_form_pre_render')) {
+          $element['subform']['#pre_render'][] = 'field_group_form_pre_render';
+        }
+        if (function_exists('field_group_form_process')) {
+          $element['subform']['#process'][] = 'field_group_form_process';
+        }
       }
 
       if ($item_mode == 'edit') {
@@ -1320,8 +1325,9 @@ class InlineParagraphsWidget extends WidgetBase {
         $item['target_revision_id'] = $paragraphs_entity->getRevisionId();
       }
       // If our mode is remove don't save or reference this entity.
+      // The check to see if mode is present is due to field group tabs.
       // @todo: Maybe we should actually delete it here?
-      elseif($widget_state['paragraphs'][$item['_original_delta']]['mode'] == 'remove' || $widget_state['paragraphs'][$item['_original_delta']]['mode'] == 'removed') {
+      elseif(isset($widget_state['paragraphs'][$item['_original_delta']]['mode']) && ($widget_state['paragraphs'][$item['_original_delta']]['mode'] == 'remove' || $widget_state['paragraphs'][$item['_original_delta']]['mode'] == 'removed')) {
         $item['target_id'] = NULL;
         $item['target_revision_id'] = NULL;
       }
diff --git a/src/Plugin/Field/FieldWidget/ParagraphsWidget.php b/src/Plugin/Field/FieldWidget/ParagraphsWidget.php
index edb24b9..347dd16 100644
--- a/src/Plugin/Field/FieldWidget/ParagraphsWidget.php
+++ b/src/Plugin/Field/FieldWidget/ParagraphsWidget.php
@@ -758,7 +758,12 @@ class ParagraphsWidget extends WidgetBase {
         ];
 
         field_group_attach_groups($element['subform'], $context);
-        $element['subform']['#pre_render'][] = 'field_group_form_pre_render';
+        if (function_exists('field_group_form_pre_render')) {
+          $element['subform']['#pre_render'][] = 'field_group_form_pre_render';
+        }
+        if (function_exists('field_group_form_process')) {
+          $element['subform']['#process'][] = 'field_group_form_process';
+        }
       }
 
       if ($item_mode == 'edit') {