Just bringing this behavior I’ve noticed to your attention. Generally, saving pages is very fast, but sometimes the saving page loader will spin forever without the “Success” message. The changes to the page were saved, the preview page reloads, the changes are there, but the save button just keep spinning and blocks you from saving again if you make additional changes without refreshing the page.
This isn’t a big issue and will happen maybe ~10% of the time while I’m editing. Just based on the pattern, it feels more like a loading bug rather than actual performance problem. I noticed a similar pattern when loading the page editor as well.