We just upgraded to Magento 2.4 and are having issues with shipstation. It will bring the orders in from Magento but not the internal notes. Also when we ship an order it will not transmit back the tracking number and mark the order as shipped. We have double checked the version of the module and it is the newest one. we need this to work or i have to go to another program.
The latest ShipStation plug-in for Magento - v.2.2.7 - should properly import your internal and customer notes from Magento into ShipStation. If you upgrade your plug-in and notes are still not importing, please open a ticket with our support team so they can troubleshoot with you further.