Ran into a weird bug

[jayavanth]

I want to move a window via python subprocess. To do this, I'm running i3-msg '[title="xyz"] move right'. If I run this command on the terminal it works as expected. Instead, if I run this in python interpreter it still works. However, if I run this as a python script from a terminal, both the terminal and the target window move.

works:
i3-msg '[title="xyz"] move right'

also works:

# python
>> import subprocess
>> subprocess.Popen(['i3-msg', '[title="xyz"]', 'move', 'right'])

moves both the window and the terminal that invoked it:

# windows.py
import subprocess
import sys

subprocess.Popen(['i3-msg', f'[title={sys.argv[1]}]', *sys.argv[2:]])

python windows.py a49c21fe move up

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Another thing I noticed is that if I run python windows.py a49c21fe move position up &, everything works as intended. Anyone knows what's going on?