"ionic cordova run browser -l " start with port:8000 but correct port is 8100

When i use "ionic cordova run browser -livereload ", local server running on http://localhost:8000.
But using port 8000 livereload can’t work.

I change port 8100 (http://localhost:8100) manually, livereload work correctly.

I need change port manually every time.
It seems like a kind of bug.

this is log.

[INFO] Waiting for connectivity with ng…
[INFO] Development server running!
Local: http://localhost:8100
Use Ctrl+C to quit this process
cordova run browser
[cordova] You have been opted out of telemetry. To change this, run: cordova telemetry on.
[cordova] startPage = /
[cordova] Static file server running @ http://localhost:8000/
[cordova] CTRL + C to shut down