How do I disable simulink embedded matlab function editor auto correct?

I am working on a Matlab function block in a Simulink model, and the auto-correct is re-naming some variables every time I go to save or update the model.

I have disabled the auto correct feature from preferences > Editor/Debugger > Language > Enabled automatic variable and function renaming. However, this option does not seem to apply to editing embedded Matlab function blocks in Simulink.

I have tested this in 11b, and 14b. Can someone please confirm this on their machine, and suggest a possible work-around?

Thanks!