When you want to drag an element to the very bottom of the content editable area, the last position available for the cursor is the end of the last sentence.
Usually you want to place elements not at the end of a line, but right after, in a new line. The behavior expected would be to see a new empty line appearing when you drag an element until the end of a page, and the possibility to drop your element in that empty line.
Tested with the {{Languages}} template at https://www.mediawiki.org/wiki/Groups
The last cursor position possible is at the end of the sentence: "... to create your MediaWiki group." Dropping the template after the last dot puts it at the end of the page, in a new line. The end result is correct, but the behavior is unituitive.
Version: unspecified
Severity: enhancement
See Also:
https://bugzilla.wikimedia.org/show_bug.cgi?id=51666