Yes, it‘s exactly that button. You can also press it without choosing any action.
Hi Elvira K, thx for answering, sorry for the delay.
I have found how to reproduce it on my system.
When a customer completes an order with bank transfer/advance payment, the system reduces the stock by the ordered quantity.
Now when I manually cancel the order, the stock is correctly raised again by the value of the order. If I now press the actualize button a second time in order/actions, the stock is reduced again. Pressing the button a third time has no effect anymore.
Her is a pic of it https://ibb.co/MGQsygt