Hello List,
In one of my project I have the same weird issue under both GNU/Linux (Linux Mint, Ubuntu Studio, Manjaro Linux, Raspberry Pi OS) and Windows with the use of Pd Vanilla GOP. It's moving/jumping down/up (y axis only) when maximizing/minimizing its windows or changing its y size with the mouse. See here attached animated GIF file (zoom-out) realized with a RPi 400.
This is true for both zoom-out / zoom-in level. But its parent patch doesn't have this weird behavior. The x,y position of the GOP is not impacted at all.
Removing from its parent patch all the objects, inside + outside the GOP, doesn't change this weird behavior. Note that trying to reproduce this problem from scratch with very simple patches+GOP is not always giving the same result. Sometimes it's okay but sometimes not. Random behavior seems to be around.
Is there a known bug in Pd Vanilla or something wrong in the design of my patch regarding GOP?
Thank you. Best, Joe-Rouen