can't move cursor further to the far right

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https://preview.redd.it/czj3cedle94c1.jpg?width=1280&format=pjpg&auto=webp&s=e2efe64922eda14934dddf62d71056ebac1f1deb

Hi all. I am using Wowup.io to update my World of Warcraft addons on the Steamdeck. I simply added it via the desktop mode.

However, in Game Mode the cursor cannot go further right than what you see in the screenshot. Its like an invisible wall. Touch also does not work in the space.

The problem I am having here is that I cannot click the close button. Anyone knows a fix for this?

(as a workaround i am closing the app via the steam menu)