[Python] Open terminal in XFCE from script and activate python virtualenv

I try to open terminal in XFCE and activate python3 virtualenv using the following line in a bash script:

xfce4-terminal --working-directory=$HOME/path/to/project --maximize \
-e 'bash -c "source $HOME/path/to/project/venv/bin/activate; bash"'


The strange thing is that the virtualenv gets kind of activated since:

which python


shows the correct path to the virtualenv directory and the project seems to be working fine.

However I don't see the (venv) to the left from the shell prompt. Moreover, when I enter deactivate it complains that no such command can be found.

Is there a proper way to solve this problem?

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