The ping is not real

[rcf45i]

Description

The "ping" value is frozen too early and remains far from the real one.

Server

LAN
nginx/1.29.3
PHP 8.3.29
Home Linux PC, HDD

Client

Android TV, Default Sony browser, ipv4.
Firefox on Gentoo Linux, ipv6.

Steps to reproduce

I ran the test in the browser, and the "ping" value almost immediately became fixed at one value even before the test was completed and did not change afterward.

Expected behaviour

The actual network response time is less than 1ms, excluding hard disk response time and other factors.

Screenshots

Ping 82.0ms, Jitter 7.13ms, Download 692 Mbit/s, Upload 490Mbit/s, from a Gentoo laptop via 802.11ac