diff --git a/addons/account/models/account_move.py b/addons/account/models/account_move.py
index d8b1bc81af9..46e3b5f8855 100644
--- a/addons/account/models/account_move.py
+++ b/addons/account/models/account_move.py
@@ -611,6 +611,21 @@ class AccountMoveLine(models.Model):
             :param excluded_ids: list of ids of move lines that should not be fetched
             :param str: search string
         """
+        epsilon = 0.0001
+
+        def _domain_range_amount(field, amount, signed=False):
+            def build_for_amount(amount):
+                return expression.AND([
+                    [(field, '>=', amount - epsilon)],
+                    [(field, '<=', amount + epsilon)]
+                ])
+
+            unsigned_domain = build_for_amount(amount)
+            if not signed:
+                return unsigned_domain
+
+            return expression.OR([unsigned_domain, build_for_amount(-amount)])
+
         context = (self._context or {})
         if excluded_ids is None:
             excluded_ids = []
@@ -627,14 +642,20 @@ class AccountMoveLine(models.Model):
             ]
             try:
                 amount = float(str)
-                amount_domain = [
-                    '|', ('amount_residual', '=', amount),
-                    '|', ('amount_residual_currency', '=', amount),
-                    '|', ('amount_residual', '=', -amount),
-                    '|', ('amount_residual_currency', '=', -amount),
-                    '&', ('account_id.internal_type', '=', 'liquidity'),
-                    '|', '|', ('debit', '=', amount), ('credit', '=', amount), ('amount_currency', '=', amount),
-                ]
+                residual_domain = expression.OR([
+                    _domain_range_amount(field, amount, True)
+                    for field in ('amount_residual', 'amount_residual_currency')
+                ])
+
+                liquidity_domain = expression.AND([
+                    [('account_id.internal_type', '=', 'liquidity')],
+                    expression.OR([
+                        _domain_range_amount(field, amount)
+                        for field in ('debit', 'credit', 'amount_currency')
+                    ])
+                ])
+
+                amount_domain = expression.OR([residual_domain, liquidity_domain])
                 str_domain = expression.OR([str_domain, amount_domain])
             except:
                 pass
diff --git a/addons/crm/models/crm_lead.py b/addons/crm/models/crm_lead.py
index 1edc0792683..7d9c4151c9e 100644
--- a/addons/crm/models/crm_lead.py
+++ b/addons/crm/models/crm_lead.py
@@ -648,7 +648,7 @@ class Lead(models.Model):
             partner_match_domain.append(('partner_id', '=', partner_id))
         partner_match_domain = ['|'] * (len(partner_match_domain) - 1) + partner_match_domain
         if not partner_match_domain:
-            return []
+            return self.env['crm.lead']
         domain = partner_match_domain
         if not include_lost:
             domain += ['&', ('active', '=', True), ('probability', '<', 100)]
diff --git a/addons/mail/models/mail_channel.py b/addons/mail/models/mail_channel.py
index 94d12ceebf2..89ce5fbeaa9 100644
--- a/addons/mail/models/mail_channel.py
+++ b/addons/mail/models/mail_channel.py
@@ -380,8 +380,8 @@ class Channel(models.Model):
                     AND P.partner_id IN %s
                     AND channel_type LIKE 'chat'
                 GROUP BY P.channel_id
-                HAVING COUNT(P.partner_id) = %s
-            """, (tuple(partners_to), len(partners_to),))
+                HAVING array_agg(P.partner_id ORDER BY P.partner_id) = %s
+            """, (tuple(partners_to), sorted(list(partners_to)),))
             result = self.env.cr.dictfetchall()
             if result:
                 # get the existing channel between the given partners