Having clicked on either of the buttons highlighted in pic 1, it takes me to pic 2, which isn't a post by Deko nor was it at 20.40.

Never had any issues before

Deko must have deleted his post

he did. And maybe he deleted it right when you did the search, so the search results still showed Deko's post, which in reality was just deleted.
Also searches are cached, which might contribute to this.

Quote from Victor :

he did. And maybe he deleted it right when you did the search, so the search results still showed Deko's post, which in reality was just deleted.
Also searches are cached, which might contribute to this.

Ah - that makes sense!

Thanks Niall & Victor.