:last-child and :last-of-type are not working when open with live server

I’m submitting a…

[ ] Regression (a behavior that used to work and stopped working in a new release)
[x] Bug report  <!-- Please search GitHub for a similar issue or PR before submitting -->
[ ] Feature request
[ ] Documentation issue or request
[ ] Other: <!-- Please describe: -->

Current behavior

css pseudo-classes :last-child and :last-of-type are not working with div element when open with live server

index.html

main.css

On live server (no border on last div element)

Expected behavior

Open index.html directly (there is a border on last div element )

Environment

Browser:

- [X] Chrome (desktop) version 67.0.3396.99
- [ ] Firefox version XX
- [ ] Safari (desktop) version XX
- [ ] IE version XX
- [ ] Edge version XX
--




For Tooling issues:

- Live Server: 5.1.1
- Platform:  Windows 10 64 bits
- Visual Studio Code: 1.25.1

Others

[jomilto]

This lines are not working with live server.

p:last-child {
    color: brown;
}

[israelfxd]

I was looking for someone with the same problem, and that’s exactly it, when opened without Live Server it works correctly.