After installing delete-revision no visual editor for pages

When i added the delete-revision plugin to remove some non-needed revisions of posts, i installed it and it worked fine to remove the extra revisions. Problem starts when i go to edit a page. when you click on the visual editor – the page shows nothing but what looks like a copy of the html editor. If you switch back to the html editor and back to the visual editor again – it collapses the text entry box all together.

I had the same behavior on another blog and the only consistent thing is this plugin.

If you remove the plugin by deactivating or deleting, the problem remains even though the plugin is gone.

Any ideas why this might be happening?

https://www.ads-software.com/extend/plugins/delete-revision/