Wrong compilation result on list indexing operation

[m13253]

Demo source code:

array = [0, 1, 2, 3];
i = 2;

// Wrong
array[i] = 42;
println("array[i] = " ++ array[i]);
println("array = [" ++ array[0] ++ ", " ++ array[1] ++ ", " ++ array[2] ++ ", " ++ array[3] ++ "]");

println();

// Correct
batch("set /a array_!i!=42");
batch("for %%i in (\"!i!\") do echo array[i] = !array_%%~i!");
println("array = [" ++ array[0] ++ ", " ++ array[1] ++ ", " ++ array[2] ++ ", " ++ array[3] ++ "]");

Compiled results:

@echo off
setlocal EnableDelayedExpansion
setlocal EnableExtensions

set /a array_0=0
set /a array_1=1
set /a array_2=2
set /a array_3=3
set /a i=2
rem Wrong
set /a array_i=42
echo array[i] ^= !array_i!
echo array ^= [!array_0!^, !array_1!^, !array_2!^, !array_3!]
echo:
rem Correct
set /a array_!i!=42
for %%i in ("!i!") do echo array[i] = !array_%%~i!
echo array ^= [!array_0!^, !array_1!^, !array_2!^, !array_3!]

Execution output:

array[i] = 42
array = [0, 1, 2, 3]

array[i] = 42
array = [0, 1, 42, 3]