Wrong method called in ItemDetail::loadDetailByItemId

[bmarquis]

This calls is wrong in \ShipperHQ\Shipper\Model\Order\ItemDetail::loadDetailByItemId
$this->orderItemDetailCollection->addItemToFilter($itemId);

It should probably be calling addItemIdToFilter located here \ShipperHQ\Shipper\Model\ResourceModel\Order\ItemDetail\Collection::addItemIdToFilter:
$this->orderItemDetailCollection->addItemIdToFilter($itemId);

Thanks,
Ben

[wsagen]

Thanks for raising also, we have a fix going out for this today.

[wsagen]

Version 20.1.1 includes fix for this issue