QueuePoll Task not being disposed properly

[akozhin-yint]

I run application with AdminClient which just checks if certain topic exists, but I noticed in dotTrace that AdminClient related Task is stuck in running state. It doesn't consume cpu, and Task just seems to be Waiting. I am not sure this is expected.
My usage approximately:

using var AdminClient = new AdminClientBuilder(new ...).Build();
var topics = AdminClient.GetMetadata(timeout).Topics;

I have other related Kafka Consumers and Producers, but they don't use AdminClients.

It is possible I am misinterpreting, so want to confirm.