I visited the main page of SEDE and noticed that most of the images return a 404:
This looks like a similar problem as reported earlier in Missing images in SEDE but that covered the site-switch drop down which is working in this case.
I suppose this is related to the content move on the CDN earlier this week.
I repro-ed this in Chrome, FF and Edge, so it is not browser dependent. I'm in Western Europe, probably routing over the AMS-IX, in case CloudFlare is involved.
Notice that following apple-touch-icons.png do load, they are all for the meta sites of: Stats , Academia , Islam , Japanse , Pets , Quantative Finance , Productivity , Lego , Portugese , Elementary-OS
Can either the paths on SEDE be fixed or the images on the CDN be restored?
Inspired on this migration I would start with this sql query on the SEDE database to stay inline with the intent:
UPDATE dbo.[Sites] SET BadgeIconUrl = ''//cdn.sstatic.net/Sites/'' + (CASE WHEN CHARINDEX(''meta.'', TinyName) = 1 THEN SUBSTRING(TinyName, 6, LEN(TinyName) - 5) + ''meta'' ELSE TinyName END) + ''/img/apple-touch-icon.png'' WHERE Id IN( SELECT Id FROM dbo.[Sites] WHERE CHARINDEX(''stackexchange.com'', Url) != 0 OR CHARINDEX(''stackoverflow.com'', Url) != 0 OR CHARINDEX(''serverfault.com'', Url) != 0 OR CHARINDEX(''superuser.com'', Url) != 0 OR CHARINDEX(''stackapps.com'', Url) != 0 OR CHARINDEX(''askubuntu.com'', Url) != 0 OR CHARINDEX(''mathoverflow.net'', Url) != 0 )