Performance plugin (jmeter) issue :

In the "Standard Mode" box, below the line "Use Relative thresholds for build comparison: "

the value of the field "( -)" of  "Unstable % Range" is not saved.

To reproduce:

 - Change the value for the field "( -)" of  "Unstable % Range"

 - Save the job

 - ReOpen the job to check the configuration

 - The value of this field is "0.0"

please find screen capture of the issue as attached

Note : the other fields are correctly saved.