Yes, on default theme it doesn't work too. I have tried this on my test instance of IPS community where is the same configuration of web server, packages etc.. The same database but 24h older and the same files. It works on testing instance but not on production instance.
And I want to share what i have investigated is that, an image appears but its opacity is set to 0%.
When i change its opacity to "unset" for example, it displays of course but still cover positioning doesnt work.
Just like there: