Subject of the issue

Horizontal resizing extends on the oppsite side. Resizing a widget to the left extends its size to the right, and vice versa.

Your environment

Issue only happens from 4.0.1 upwards. 3.3.0 works fine!
Raspberry Pi OS, Electron/Chromium

Steps to reproduce

Video actual behaviour (bug from 4.0.1 onwards): https://streamable.com/kxykf4
Video expected behaviour (3.3.0 and below): https://streamable.com/v1y2pa

Find the code here: https://gist.github.com/riccardolardi/1a73c93d11b6486c26438fb77b9ed5d4

Expected behavior

Resizing to the left should extend the widget size to the left.

Actual behavior

Resizing to the left does extend the widget size to the right and vice versa. Vertical resizing (only South tested) works fine.

Thanks for your support.