Source doesn't refresh shards

[HuwCampbell]

According to the API documentation:

Shards are ephemeral: They are created and deleted automatically, as needed.
Any shard can also split into multiple new shards; this also occurs automatically.
(Note that it is also possible for a parent shard to have just one child shard.) A
shard might split in response to high levels of write activity on its parent table,
so that applications can process records from multiple shards in parallel.

The source connector only appears to find Shards on startup, and if a shard it split or closed off, it doesn't start reading from the children.

My logs are filled with Shard ID {}for table{} has been closed, it will no longer be polled messages, and traffic disappears over time.