News post disappeared

Site URL: https://www.cosmiccatgroup.com/insights/

Hi I ran in a strange problem with a blog post. A post did simply disappear from the website, see here: cosmiccatgroup.com/insights/who-on-earth-is-cosmic-cat-group. The links now throws a 404. Once try to create a new post with same url I get the feedback 'url already in use'.

So I did look in all trash folders to check if post got accidentally deleted, but no nothing there as well.

Is this a common bug?
Does anyone have a hint or solution?

I appreciate any support. 

Best,
Ben