RPATH issue (No module named 'PySide6.QtCore')

Apparently since release of PySide6 6.3 the RPATH seems to have broken in Linux (Manjaro/Arch).

In this setup pyside6 installs to

$HOME/.local/lib/python-<version>/site-packages

(also tried with pyside6-essentials).

Now the QtCore module is not found:

Python 3.10.4 (main, Mar 23 2022, 23:05:40) [GCC 11.2.0] on linux

>>> from PySide6 import QtCore

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: cannot import name 'QtCore' from 'PySide6' (unknown location)

(same with `from PySide6.QtCore import Qt)

Note: Cross-checked this in a venv and it works! At least this explains nobody reported this yet. I still think installing in ~/.local should work alike.