Yes, it is an issue with the US tariffs.
This was an announcement from a Community Manager last month.
The situation with GSP remains the same at the moment, and we don't have any further updates as of yet. The latest update is that Select GSP listings have begun to appear for US buyers, allowing some UK sellers to start seeing sales to the US. We will continue to work on ensuring that GSP service coverage is maximised, as customs requirements evolve. Until then, if you are not yet seeing GSP coverage for your item and wish to list items for US buyers, you can specify a shipping service to the US.
@iwonderhowmuch
