Issue with Premium Plugin and Undo functionality

When using the premium plugin, the standard Gutenberg "undo" function no longer works properly. This issue does NOT happen when using the Free version of the plugin. If I type some text and press undo when the PREMIUM plugin is enabled, it only removes one letter at a time and then eventually none on repeat clicks of undo, whereas on the FREE plugin the undo functionality works as expected (removes whole word). This means that I can't currently use the premium plugin on a client site, so if you could release a fix soon it would be appreciated.