I can reproduce this easily, so shoul be easy to fix. What happens in this TW4 site is:

• Editing non TW related things (templates, content) => snappy refreshes.
• Edit TW stylesheet => relatively slow rebuild (Tailwind)
• Then editing non TW related things (templates, content) => seems to keep on rebuilding TW, which should not be needed.

I'm not sure what's happening, or where, but this seem to be something new.