Closed in favor of this ticket which has reliable reproduction steps
1. Log in to `master.test` (observe "Enterprise licence expires....." banner
2. In an incognito window, log in as a system admin to `master.test` and set up a non-dismissable announcement banner (Sys Console > Site Configuration > Announcement Banner)
3. Go back to the window you logged in to in step 1 and dismiss the "Enterprise licence expires...." banner
Once "Enterprise licence expires...." banner is dismissed, the non-dismissable banner set up in step 2) above is visible but is overlapping with text across the top of the screen (see screenshot)
Once "Enterprise licence expires..." banner is dismissed, non-dismissable banner is visible but not overlapping with text across the top of the screen.
Note: the same occurs if the dismissable banner on top of a non-dismissable banner is a "check websocket" error banner