Issuing bank is no reason to protest.
"UCP 600" Article 31 B provides that:at different times,different points will be under the same contract on the shipment of goods of the same voyage,the same means of transport,and to the same destination,even if the transport documents indicate different shipment,Different port of shipment,can not be shipped in batches.
1.Not a partial shipment
2.More or Less is also the number of terms allowed