If you scroll down the list, the part that is not on the screen anymore will still be clickable. It will basically scroll (not visible) through the tabs and the top of the menu.
You can't use the tabs anymore because of that since your mouse click will select the control that's beneath it. A bit hard to explain.

Clicking on cargo or thrust will also click on the buttons below.

Same goes for this one but you never notice it since "drop to sell" is greyed out till you have a stack in your hand.

The inventory menu system doesn't catch mouse clicks properly for the right click split dialog.
Tooltip appears as if the mouse was behind the split menu

You can right click through the split dialog, this will create a new dialog menu above your own (on the exact same position, you have to move it yourself to notice it)

Clicking on the "plus" or "minus" in build mode, places blocks behind those buttons.

Radial menu options that lead to another menu, also trigger anything you've selected on your hotbar.
It's fine if you don't click but select something by hovering your mouse over it and releasing the radial menu key.