Instantiated Ui elements don't scale with canvas?

in webGL. when I click on the button to create this sticky (an UI element, child of my canvas), it has a different size in fullscreen… even though every other element is scaling up nicely, anyone a clue what’s going on here?


Here are some notes on UI Anchoring, Scaling, CanvasScaler, etc:

https://discussions.unity.com/t/845782/4

https://discussions.unity.com/t/848795/5

You should endeavor to keep all things in your UI hierachy as unity scaled (1,1,1) and use the anchors to do your work.