When editing a freestyle project, neither the "Use custom workspace checkbox" nor the custom workspace "directory" parameter value is being saved.

How to reproduce:

-Clone an existing project AAA which has custom workspace checkbox checked and set to C:\JenkinsWorkspaces\AAA, save this projects as BBB

-Edit project BBB, uncheck custom workspace checkbox, save the project

-Reopen project BBB for editing, the custom workspace is checked and value for directory is displayed as empty string

-Change value of directory to C:\JenkinsWorkspaces\BBB, save the project

-Reopen project BBB, the directory for custom workspace is displayed as empty string

-Check job config history, there will be no changes related to custom workspace settings

-Find the BBB project xml file on the Jenkins jobs folder and look for <customworkspace>, you will find the value C:\JenkinsWorkspaces\AAA there

Workaround:

-Stop Jenkins

-Edit <customworkspace> value directly in the project xml file

-Start Jenkins and from now the project will be build in the desired custom workspace