LLChat message types have different senders

Environment

Lua Viewer: Second Life Release 7.1.9.10286089860 (64bit)

Description

Sender is either the script or the user when using LLChat function.
This should be consistent and all should have the same sender.
Following image shows use of LLChat.sendWhisper(), LLChat.sendNearby() and LLChat.sendShout() respectively

Reproduction steps

Here is a modified test_LLChat.lua script that produces the above output

LLChat = require 'LLChat'
local timers = require 'timers'

function generateRandomWord(length)
    local alphabet = "abcdefghijklmnopqrstuvwxyz"
    local wordTable = {}
    for i = 1, length do
        local randomIndex = math.random(1, #alphabet)
        table.insert(wordTable, alphabet:sub(randomIndex, randomIndex))
    end
    return table.concat(wordTable)
end

local msg = {'AI says:'}
math.randomseed(os.time())
for i = 1, math.random(1, 10) do
    table.insert(msg, generateRandomWord(math.random(1, 8)))
end

local id = "5fea458b-30d9-b032-ddde-d1b5276f2949"
LLChat.sendWhisper(table.concat(msg, ' '))
timers.Timer(1, 'wait')
LLChat.sendNearby(table.concat(msg, ' '))
timers.Timer(1, 'wait')
LLChat.sendShout(table.concat(msg, ' '))