On the Gemcutting screen, can't preview the stats upgrade of the secondary tab

When attempting to preview the secondary stat upgrades in the Gemcutting interface, the stats preview disappears as soon as the Alt key is pressed. This makes it impossible to see the potential secondary attribute increase, only the main stats, even if they aren't affected by the upgrade.

Steps to Reproduce:

Open the Gemcutting interface.

Hover over a skill that has multiple effects

Press alt to access the second tab

Notice that the stats increase preview for secondary stats disappears and how it's impossible to get the information for the secondary stats

Expected Result:

The upgrade preview should remain visible while holding the Alt key, allowing the player to preview the changes on the second and the first tab.