Problem during order status update: all statuses are updated all at once

[zzsser]

VM1.9.8 Version M

By default, in the orders list, the tickbox "Update status" of each order is checked. So, if I modify a status of an order and I click icon "Update status", the date of all statuses is updated to the actual date.

This is not the case if I go on the order page to update its status. This is only the case on the global orders list.