Disable Accidental Contract Size Changes in Chart Trader Dropdown

I’ve noticed that while scrolling in the Chart Trader, I have inadvertently increased the contract size multiple times without realizing it. Unfortunately, this has led to unintended trades, including a loss of nearly $1,000 yesterday.

To prevent this from happening again, I would really appreciate it if there were an option to disable contract size changes via scrolling. This has occurred too often, and I’d like to avoid any further accidental adjustments.