After updating to 7.62.0 one of my unit tests started failing. The problem is that when the server unsets a cookie, and the libcurl client makes a subsequent request within 1 second after the response, curl will include the deleted cookie in the request.
I run into this with the R bindings, not sure if there is an easy way to reproduce in the cmd line. Basically the test performs the 4 steps below (using a single easy handle)
create new easy handle, set curlopt_verbose = 1
perform request to https://httbin.org/cookies/set?foo=123&bar=456. The server responds: