this is a reproducing of issue: spring-cloud/spring-cloud-netflix#2815
request to reproduce:
curl -X POST \
'http://127.0.0.1:8089/test?uid=123456' \
-H 'content-type: multipart/form-data; boundary=----WebKitFormBoundary7MA4YWxkTrZu0gW' \
-F uid=654321
-F 'photo=@/test.jpg'
it has 2 uid params = [123456,654321] launch 2 modules, make the request and see that 654321 will be removed and you will not see that in mockServer