Note that since XWIKI-24157 the macro output is replaced by the macro placeholder after a macro is edited. In other words, until we have the new macro output (to match the updated macro parameters) we consider the macro has no output so we show the macro placeholder. This is consistent with CKEditor where the macro placeholder is shown until the content is reloaded (i.e. until we fetch the updated macro output).
This message was sent by Atlassian Jira (v9.3.0#930000-sha1:287aeb6)
If image attachments aren't displayed, see this article.