File renaming in Lightroom cloud-based?

I understand that up until somewhat recently there was no way to rename files / photos in Lightroom cloud-based, but now you can. 

This is great, but could anyone explain a bit how Lightroom is treating the new file names?
When I rename my photos in Lightroom everything looks good, but I notice that the files are not renamed in Lightroom Classic, which I have synced. 

Edits, gps data, ratings etc are synced between Lightroom cloud-based and Lightroom Classic, but renaming the files are not. 
Or rather, if I rename the files in Classic it is synced to Cloud-based, but not the other way around. 

I’m just trying to figure out what is happening. 

My goal is to get rid of Classic completely, but there are still a couple of things standing in the way. Lack of Map module being the biggest issue. File handling being another one, but it's less of an issue the more I learn about it.