[Plugin: Approval Workflow] Posts require editing twice

For some reason, this plugin causes edits of a post/page/custom post etc to require editing twice. Saving after the first edit strips the edit, reapplying the edit then works.

Confirmed that this does not happen when the plugin is deactivated.

Is this a known issue? Any advice to overcome as otherwise this plugin is ideal.

https://www.ads-software.com/extend/plugins/approval-workflow/