Screen redrawing only updating upon window resizing

URL of experiment:

Description of the problem: Hi everybody, I am trying to make an online version of a 3d mental rotation task. Locally the script runs fine, but on pavlovia I encounter a strange problem. The way I have set it up is that mouse clicks change opacity from 0 to .2, to provide feedback on where exactly the mouse has been clicked. What I realised is that the browser (tried with many different ones) only redraws the screen if I resize the browser window. If I don’t and run the experiment by default in full screen, there is no visual feedback from the mouse clicks.