Memory corruption running gui_mainfcn.m

This looks like a memory corruption problem, but I could use some help identifying what's going on and how to debug this.

Quick Summary

The C:\Program Files\MATLAB\R2018a\toolbox\matlab\guide\gui_mainfcn.m has this struct initialization on line 31 (at least in my copy):

gui_StateFields =  {'gui_Name'
    'gui_Singleton'
    'gui_OpeningFcn'
    'gui_OutputFcn'
    'gui_LayoutFcn'
    'gui_Callback'};

After that line executes, I set a breakpoint and evaluate gui_StateFields in the Command Window. The result I get is this:

K>> gui_StateFields
gui_StateFields =
  6×1 cell array
    {'敤䙒㸀     '    }
    {'gui_Singleton' }
    {'gui_OpeningFcn'}
    {'gui_OutputFcn' }
    {'gui_LayoutFcn' }
    {'gui_Callback'  }

While running this script, MATLAB did crash a couple times, forcing me to restart it.

A couple questions:

• What could cause the value of the first cell to be different, right after the struct initialization is executed?
• Is there a tool for looking at the memory space of the MATLAB script?

A fix isn't crucial, this is just a demo I'm trying. However, I want to understand what is going on and how to debug this, in case it occurs again when it is a critical project.

Additional Details

Running this on:

Windows 10 Pro 64 bit Version 1803

MATLAB Version: 9.4.0.885841 (R2018a) Update 3, 64-bit, Home License

The script I'm running is calling the function with the following input:

gui_State = 
  struct with fields:
          gui_Name: 'bladeRF_rx_gui'
     gui_Singleton: 1
    gui_OpeningFcn: @bladeRF_fft_OpeningFcn
     gui_OutputFcn: @bladeRF_fft_OutputFcn
     gui_LayoutFcn: []
      gui_Callback: @frequency_Callback

varargin =
  1×4 cell array
  Columns 1 through 3
    {'frequency_Callb…'}    {1×1 UIControl}    {1×1 matlab.ui.eventdata.ActionData}
  Column 4
    {1×1 struct}

The problem occurs here (from C:\Program Files\MATLAB\R2018a\toolbox\matlab\guide\gui_mainfcn.m):

function varargout = gui_mainfcn(gui_State, varargin)
% GUI_MAINFCN...

gui_StateFields =  {'gui_Name'
    'gui_Singleton'
    'gui_OpeningFcn'
    'gui_OutputFcn'
    'gui_LayoutFcn'
    'gui_Callback'};
gui_Mfile = '';
% breakpoint next line
for i=1:length(gui_StateFields)
    if ~isfield(gui_State, gui_StateFields{i})
        % ERROR here. '敤䙒㸀     ' instead of 'gui_Name' in struct
        error(message('MATLAB:guide:StateFieldNotFound', gui_StateFields{ i }, gui_Mfile));
    elseif isequal(gui_StateFields{i}, 'gui_Name')
        gui_Mfile = [gui_State.(gui_StateFields{i}), '.m'];
    end
end

And the error I get:

Error using gui_mainfcn (line 40)
Could not find field '敤䙒㸀     ' in the gui_State struct in GUI MATLAB-file

I have tried restarting MATLAB, but I haven't tried rebooting yet.