chaosmonkey | Chaos Monkey is a resiliency tool | Testing library

I am having a hard time in Chaos Monkey For Spring Boot regarding error responses when a user POSTs an invalid (like {"level": -2}update via REST to our actuator endpoint where one can update options of the behavior of CMSB (only positive levels are allowed). In the first image, I set the management.server.port to 8888 and the app port to 8080. When posting a new property to the CMSB REST API I am getting the following response (which is not what we would have expected):

And in case I leave the management port at the same port the same as the app I am getting the following response:

For both cases we would have expected the same error response (the second one). So we're asking us (at CMSB) whether this is an intended behavior of spring boot and if not, what our options are to get around writing our own error response handler in case the management port is different from the app port. Please note that this is not about the intended behavior of chaos monkey for spring boot but rather about whether this is a spring boot bug or not. In both cases we would like to have a detailed error response so a user knows what's wrong. Under the hood we are using the @Validated annotation in combination with something like this to validate inputs: