Replying to
@siracusa@mastodon.social 2 cups of coffee and I think I figured it out. I thought I did exactly the same thing so I created an empty project and got to work.
When you are in an App and open a window and the size of that new window has a width and height with even numbers, lets say 340 by 420: no ‘pulse’ animation
When the size of the window has an odd size (341 by 421): there is a ‘pulse’ animation
The animation is in the direction of the odd number
FB22304835
https://youtube.com/shorts/xGh7Mqp7Hy4
https://gist.github.com/bglnelissen/d5cb43cbed614e69a28780895096a129