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Flash of Unstyled Content-type error occurs on loading any file on Commons
Open, Needs TriagePublicBUG REPORT

Description

Steps to replicate the issue (include links if applicable):

What happens?:
The page loads a div (class='wbmi-tabs-container oo-ui-layout oo-ui-panelLayout') that materializes after the page has already loaded, causing everything to shift upward, frustrating my ability to interact with the page. This has happened hundreds of times since this feature was introduced.

What should have happened instead?:
Since the div has a standard size per user (in my case, it displays four languages on the File Information panel), the page should load with an empty div that has that many pixels and then fill in the data by drawing to the canvas or it could load that div earlier in the browser's page loading by being placed earlier in the HTML (I reckon, I could be wrong) or loading this div could be given priority with a script to make it not appear and then jump.

Software version (on Special:Version page; skip for WMF-hosted wikis like Wikipedia):

Other information (browser name/version, screenshots, etc.):
*Multiple browsers over multiple years.