When I run ‘yarn run start’ > localhost:3000 opens and takes easily 3-5 minutes to actually load all website assets. When I make a change to SCSS file(s) and save > changes on the page that is loaded take affect quickly. However; if I need to go to another page I have to wait another 3-5 minutes for everything to load.
This sounds like it might be an issue more closely related with the Browsersync config. If you load the site directly, do you still notice a massive slowdown?