Hi @RuizuKun_Dev - thanks for reporting this issue! I believe this is an issue similar to previous reports of AutomaticCanvasSize not working properly with size constraints, however, I created a ticket to investigate your specific report in case there are any differences in behavior from what we’ve seen.
Hi @Scalper85 - it’s a little difficult to see, but if you watch closely, the scrollbar isn’t updating in response to the green elements being adding to the scrolling frame, which means the canvas size isn’t updating properly (when AutomaticCanvasSize is set).