Before creating the removal order, there were over 1,300 FBA inventory units available. At that time, there were no customer orders shown in the system. However, after I created the removal order to remove 1,100 units (leaving 200 units as FBA inventory because sales were low), the listing became inactive. This has happened twice.

When I create a removal order, all my units are in FBA-available or reserved, and nothing is in FC transfer, FC processing, or customer orders. But as soon as I place the removal order, my listing becomes inactive, showing as out of stock. Then, some inventory moves to FC transfer, some to FC processing, and some to customer orders. Because of this, the listing goes inactive.

Amazon Support is not answering exactly to this matter,

why i cannot create bulk order?all at one?