The options do not work with Guberbug. Known issue.
https://github.com/AdvancedCustomFields/acf/issues/112
It is (basically) being ignored by WP along with several other issues
https://github.com/WordPress/gutenberg/issues/12692#issuecomment-452165743
If you want to use ACF without using the guberbug editor then I suggest the Disable Gutenberg plugin.
