Cascading Principles - not working

I’m having same issues. I’m very much familiar with cascading principles and everything was working just fine but recently I’ve been trying to readjust my text element and I went to tablet to readjust line spacing and once I adjusted it on tablet it actually adjusted it on desctop, same with mobile. Looks like a bug to me because it was fine and line spacing is included in cascading effect. I’m sure we can figure this out but frustrating.