Since [1], messages were ordered in ascendant order if the `after` parameter was passed to the `_message_fetch` method. This leads to messages being inserted in the wrong order when several messages are batched then fetched via the `/thread/messages` route. In practice, this order can be removed since the `/channel/messages` route already orders its messages correctly. 1: https://github.com/odoo/odoo/pull/116666/ task-3349175 closes odoo/odoo#123727 X-original-commit: 597b0b00068f6ab99632563faeb2ea18f5c9056f Signed-off-by: Alexandre Kühn (aku) <aku@odoo.com> Signed-off-by: Stockbauer Matthieu (tsm) <tsm@odoo.com>