Thank you David. I’ll try out what you’ve written.
In the meantime, I’ve added a Minimum Working Example to the question. I am starting to think the issue has something to do with Windows ignoring update calls since it “thinks” the window is unresponsive.
For quick updates the .update() method seems to be working. Only after the visualization window has been opened for a while, it stops refreshing and, after clicking on it, I get a “not responding” from Windows.