CommentLuv Premium stopping me from posting

I’ve found that in recent weeks my self-hosted blog at DannyUK.com hasn’t been allowing me to either preview or post new posts smoothly when CommentLuv Premium is active.

By smoothly I mean that if I choose to preview a post, or if I choose to publish a post then 80% of the time the page will time out and just show a blank page.

However, if I disable CommentLuv Premium then the problem doesn’t happen at all.

I’ve tried disabling other plugins and it’s only CLP that seems to have this effect. Has anyone else noticed this, or is there any easy fix to stop it from happening please?

https://wordpress.org/plugins/commentluv/