We have been using Shipstation for a while now, and to say it is useless would be an understate. When using carrier APC Overnight it does not mark the tracking off properly for either TikTok shop or on amazon. This has caused us loads of issue with the tracking and invalid tracking rates on both platforms. Directly because of Shipstation. When I raise is with the customer service team I get told to go a talk to Amazon and TikTok as it is their systems that are at fault. What's the point of paying for system that you have manually up date everything!?!
