Lyx 2.2 and spaces before displaymath

[Kiuhnm]

Hello,

I wrote a document in Lyx 2.2 and I noticed that I had added extra empty 
lines before displaymath elements all over the document.

This happens when one hits return before pressing Ctrl+Shift+M. Did this 
happen in Lyx 2.1.4 too? I never noticed. Should this behavior be 
considered a feature or a bug?

Kiuhnm