When one has multiple visualizations on one page and you maximize one of the visualizations then you are still able to change the size of the visualizations in the background instead of marking data in the visible visualization. This appears to be a bug to me.
Thank you for reporting this. I was able to reproduce the behavior you describe and will log it as a defect.
This appear to be a defect/bug. The Ideas portal is primarily intended for feature and enhancement requests, while product defects are tracked through our support team. To ensure this issue is propertly tracked and prioritizes, I recommend opening a support case and referencing this description. This allows the issue to be logeed formally.
I will close this idea accordingly. Thank you for highlighting the issue.