I’m not sure I understand you. I have a folder open as a project (with a few HTML, and the SCSS file).
I have one HTML open in PG (doesn’t matter which HTML I have open, none work). The changes to the HTML code itself can be successfully saved, but not the changes to the SCSS code.
So I’m not sure what do you want me to try, because I have a page from the project open in PG.