diff --git a/addons/stock/wizard/stock_backorder_confirmation.py b/addons/stock/wizard/stock_backorder_confirmation.py
index 5866b463930..3705efec9c7 100644
--- a/addons/stock/wizard/stock_backorder_confirmation.py
+++ b/addons/stock/wizard/stock_backorder_confirmation.py
@@ -28,10 +28,13 @@ class StockBackorderConfirmation(models.TransientModel):
     @api.model
     def default_get(self, fields):
         res = super().default_get(fields)
-        if 'backorder_confirmation_line_ids' in fields:
-            if self.env.context.get('default_pick_ids'):
-                res['pick_ids'] = self.env.context['default_pick_ids']
-                res['backorder_confirmation_line_ids'] = [(0, 0, {'to_backorder': True, 'picking_id': pick_id[1]}) for pick_id in res['pick_ids']]
+        if 'backorder_confirmation_line_ids' in fields and res.get('pick_ids'):
+            res['backorder_confirmation_line_ids'] = [
+                (0, 0, {'to_backorder': True, 'picking_id': pick_id})
+                for pick_id in res['pick_ids'][0][2]
+            ]
+            # default_get returns x2m values as [(6, 0, ids)]
+            # because of webclient limitations
         return res
 
     def process(self):
diff --git a/addons/stock/wizard/stock_backorder_confirmation_views.xml b/addons/stock/wizard/stock_backorder_confirmation_views.xml
index c44f1b7147f..1258b70ffae 100644
--- a/addons/stock/wizard/stock_backorder_confirmation_views.xml
+++ b/addons/stock/wizard/stock_backorder_confirmation_views.xml
@@ -15,6 +15,16 @@
                     </p>
                 </group>
 
+                <!-- Added to ensure a correct default_get behavior
+
+                The wizard is always opened with default_pick_ids values in context,
+                which are used to generate the backorder_confirmation_line_ids.
+
+                To ensure default_pick_ids is correctly converted from the context
+                by default_get, the field has to be present in the view.
+                -->
+                <field name="pick_ids" invisible="1"/>
+
                 <field name="show_transfers" invisible="1"/>
                 <field name="backorder_confirmation_line_ids" nolabel="1" attrs="{'invisible': [('show_transfers', '=', False)]}">>
                     <tree create="0" delete="0" editable="top">
diff --git a/addons/stock/wizard/stock_immediate_transfer.py b/addons/stock/wizard/stock_immediate_transfer.py
index fc494d8d5bc..2afbc6337b0 100644
--- a/addons/stock/wizard/stock_immediate_transfer.py
+++ b/addons/stock/wizard/stock_immediate_transfer.py
@@ -28,10 +28,13 @@ class StockImmediateTransfer(models.TransientModel):
     @api.model
     def default_get(self, fields):
         res = super().default_get(fields)
-        if 'immediate_transfer_line_ids' in fields:
-            if self.env.context.get('default_pick_ids'):
-                res['pick_ids'] = self.env.context['default_pick_ids']
-                res['immediate_transfer_line_ids'] = [(0, 0, {'to_immediate': True, 'picking_id': pick_id[1]}) for pick_id in res['pick_ids']]
+        if 'immediate_transfer_line_ids' in fields and res.get('pick_ids'):
+            res['immediate_transfer_line_ids'] = [
+                (0, 0, {'to_immediate': True, 'picking_id': pick_id})
+                for pick_id in res['pick_ids'][0][2]
+            ]
+            # default_get returns x2m values as [(6, 0, ids)]
+            # because of webclient limitations
         return res
 
     def process(self):
diff --git a/addons/stock/wizard/stock_immediate_transfer_views.xml b/addons/stock/wizard/stock_immediate_transfer_views.xml
index 73c9ec8910b..ef562bfda76 100644
--- a/addons/stock/wizard/stock_immediate_transfer_views.xml
+++ b/addons/stock/wizard/stock_immediate_transfer_views.xml
@@ -9,6 +9,16 @@
                     <p>You have not recorded <i>done</i> quantities yet, by clicking on <i>apply</i> Odoo will process all the quantities.</p>
                 </group>
 
+                <!-- Added to ensure a correct default_get behavior
+
+                The wizard is always opened with default_pick_ids values in context,
+                which are used to generate the backorder_confirmation_line_ids.
+
+                To ensure default_pick_ids is correctly converted from the context
+                by default_get, the field has to be present in the view.
+                -->
+                <field name="pick_ids" invisible="1"/>
+
                 <field name="show_transfers" invisible="1"/>
                 <field name="immediate_transfer_line_ids" nolabel="1" attrs="{'invisible': [('show_transfers', '=', False)]}">>
                     <tree create="0" delete="0" editable="top">