To add to the annoyance from the fact that this banner

• shifts content because it's pulled in by JavaScript instead of being inserted by back-end;
• reappear very soon after you closed it the previous time,

it also has a *tiny* close button which leads to misclicks (the rest of the banner is a click area leading to the target page):

I suggest making it 22px rather than 17px.

Related task: T204690: Close button on CentralNotice banner is too small on mobile