You can see the mouse going over the leather in the inventory, it seems like i thinks the bank is open while it is not.

most of the time it banks normal but sometimes it bugs out to this issue

 

Post your banking code maybe we can try helping you out

if(Bank.contains(myPlayer()) && !inventory.contains("Cowhide") && !bank.isOpen() && bank !=null)

{

RS2Object BankBooth = objects.closest("Bank booth");

if (BankBooth != null && BankBooth.exists())

{

if (BankBooth.isVisible())

{

BankBooth.interact("Bank");

sleep(random(1600, 2000));

}

else

{

camera.toEntity(BankBooth);

}

}

} else if(bank.isOpen() && interfaces.get(12).isVisible())

{

if(!inventory.contains("Cowhide"))

{

log(bank.deposit("Leather", 27));

for(int i = 0; i<30 && inventory.contains("Leather"); i++)

{

sleep(50);

}

if(bank.contains("Cowhide"))

{

bank.withdrawAll("Cowhide");

for(int i = 0; i<30 && !inventory.contains("Cowhide"); i++)

{

sleep(50);

}