Karate test follows 303 dummy URL when `Expires: 0` header is missing

I have a Karate test that sends a POST that then will send back a redirect to a dummy address. With a recent Spring upgrade, I am now seeing the redirect coming back as a 303 rather than a 302.

I do not want this 302 URL to be followed with a request. The test just verified that we got a 302 back, and continued with more validation. This is what I have been seeing up until the Spring upgrade. However, with the 303 returned, it is then followed by a GET request to the dummy URL, which then fails with an UnknownHostException. I think perhaps due to the presence of Expires: 0 in the headers of the 302. The 303 does not contain this header (or Pragma: no-cache but I can't see how that would affect it). Below are the reponse headers for each, with differences highlighted with *

302

  5 < 302
* 5 < Cache-Control: no-cache, no-store, max-age=0, must-revalidate
  5 < Connection: keep-alive
  5 < Content-Language: en-US
  5 < Content-Length: 0
  5 < Date: Mon, 16 Mar 2020 12:04:55 GMT
* 5 < Expires: 0
  5 < Location: http://anywhere?key=value&code=iXAnzC
* 5 < Pragma: no-cache
  5 < Server: nginx/1.17.9
  5 < X-Content-Type-Options: nosniff
  5 < X-Frame-Options: DENY
  5 < X-XSS-Protection: 1; mode=block

303

5 < 303
5 < Cache-Control: no-store
5 < Connection: keep-alive
5 < Content-Language: en-US
5 < Content-Length: 0
5 < Date: Fri, 13 Mar 2020 11:06:31 GMT
5 < Location: http://anywhere?key=value&code=05O7lL
5 < Server: nginx/1.17.9
5 < X-Content-Type-Options: nosniff
5 < X-Frame-Options: DENY
5 < X-XSS-Protection: 1; mode=block

We do not explicitly set these headers so it will be Tomcat/NGinx behaviour, which means it's going to be standard on many servers. Is this generally expected behaviour with 303's or is this related to the differences in the headers?