Inventory Sell Popup does not confirm with Enter

Playing on Chrome, desktop. Clicking the Sell button on an item, then pressing Enter on the keyboard should confirm the popup and sell the item, as pressing Enter when a popup appears normally confirms or dismisses the popup in some way. When pressing Enter during the confirmation popup when attempting to sell from the inventory, additional popups appear instead, as if the tab focus was not shifted to the popup and was still on the Sell button. After clicking somewhere on the page after the popup appears, pressing Enter will sell the item as expected. Steps to reproduce:

1. Visit the inventory page.
2. Select an item.
3. Click the Sell button.
4. Press Enter on the keyboard. Popup does not disappear and instead another is created.

This is noticable even without using the Inspect tool or viewing the HTML; the background visibly darkens more with each additional popup from each additional Enter press. In the image above, the Inventory page is not even visible behind the popups.