Width and Update Interval Optons do not Save

Package: mate-applets 1.20.1-0ubuntu1
Release: 18.04 Ubuntu Bionic Beaver (development branch)
Version: 1.20.1-0ubuntu1

Expected:
Changes to System Monitor applet width and System monitor update interval save and are persistent following a reboot.

Actual:
Changes to System Monitor applet width and System Monitor update interval do not save and return to default states following a reboot.

Steps to Reproduce:

1. In Ubuntu Mate, right-click on a panel and click "Add to Panel..."
2. Add System Monitor applet to Panel
3. Right click on System Monitor applet in Panel
4. Click Preferences
5. In "System Monitor Preferences" window, go to "Options" section and change the values for "System monitor width:" and "System monitor update interval" (I changed to 80 pixels and 10000 milliseconds, respectively)
6. Click "Close" to close (and save) changed width and update interval options
7. System monitor width and System monitor update interval appears to change as expected, HOWEVER now try the following:

8. Right click on System Monitor applet in Panel
9. Click Preferences
10. In "System Monitor Preferences" window, under "Options" section, the values shown for "System monitor width:" and "System monitor update interval" have reverted to default values ***even though the applet itself remains at user-set values*** The values displayed in the System Monitor Preferences dialog are now inconsistent with the appearance of the applet, which is incorrect behavior.

11. Change the values for "System monitor width:" and "System monitor update interval" to match the appearance of the applet (I changed to 80 pixels and 10000 milliseconds, respectively)
12. Click "Close" to close (and save) changed pixels and milliseconds settings
13. Right click on System Monitor applet in Panel
14. Click "Lock To Panel
15. Reboot computer
16. Upon reboot and login, system monitor applet width and update interval have reverted to default values, ignoring user-set values. This is incorrect behavior.