I found the reason.

The reason was I execute changed "start_protected_game.exe".

After I execute armoredcore6.exe, timer goes correctly.

If someone execute start_protected_game.exe, try execute armoredcore6.exe

i already have EAC disabled

I got problem for accessing armored core 6 process.

I think it may be a problem with LiveSplit.AutoSplitters.xml, because of the list of soulsplitter is shown as below:

<Games>
      <Game>Dark Souls</Game>
      <Game>Dark Souls 1</Game>
      <Game>Dark Souls 1: Prepare to Die Edition</Game>
      <Game>Dark Souls: Prepare to Die Edition</Game>
      <Game>Dark Souls Remastered</Game>
      <Game>Dark Souls: Remastered</Game>
      <Game>Dark Souls III</Game>
      <Game>Dark Souls 3</Game>
      <Game>Sekiro</Game>
      <Game>Sekiro: Shadows Die Twice</Game>
      <Game>Elden Ring</Game>
      <Game>Armored Core 6</Game>
      <Game>Armored Core VI: Fires of Rubicon</Game>
    </Games>

I think that the order of armored core naming is the problem.

How can i change this order?

I have changed the file with reordering the list.

But after executing program, it changed back to before.