DCOS UI should never change the case of fields in the JSON
I updated the labels present on an application within Marathon using the DCOS UI.
The UI promptly changed the case of certain environment variables in my application definitions, which caused breakage.
There's no reason that the UI should update and/or change fields which were not explicitly edited by the user.
you're right, this will be fixed in the next patch release of 1.8, which will be 1.8.8.
Thank you for the report.