server doesn't take into account header change

[fleandrei]

To reproduce

• Open a custom site in a server A (for example dev.massa-deweb.xyz)
• Add a header to this site via the cli metadata command like explained here. Wait some time for the operation to be finalized
• If you reload the site, the header is not returned by the server A
• If you open the site in another server B (like the localhost for example) the header is returned as expected
• Now remove the header and wait some time for the operation to be finalized.
• The server B still return the header.

How to

The error seems to be caused by a cache problem. If we manually remove the cache, the server take into account the header change.