Times.once returns more than once

[maestrokame]

Describe the issue
I mocked a request with Times.once() but the response is returned to more than one request.

What you are trying to do
I'm trying to mock an API that works like a queue. Multiple clients are polling that API waiting for any data to unconsume.
I'm trying to use Times.once() so that only to one of the clients can get the mocked response.

MockServer version
5.14.0

To Reproduce
A repository with minimal reproduceable. Please try a couple of times if it does not reproduce.
https://github.com/maestrokame/reproduce-mockserver-issue-with-once/tree/main

1. How you are running MockServer (i.e maven plugin, docker, etc)

MockServerClient mockServer = ClientAndServer.startClientAndServer(3000);

2. Code you used to create expectations

mockServer.when(request("/output/.*").withMethod("GET"), Times.once())
        .respond(response()
                .withStatusCode(200)
                .withBody("OK"));

3. What error you saw
   No error. Just observed more than one API client getting the same response.

Expected behaviour
Return the response only to one of the clients

MockServer Log
log

[bonati-s]

Linked to #1834