The order of elements in more complex diffs is not consistent with the order of elements in the formal datamodel as specified in https://www.mediawiki.org/wiki/Extension:WikibaseLexeme/Data_Model. This is visible when comparing two revisions with lots of edits in between, or when comparing two revisions from two different Lexemes. The later can be achieved by editing a URL like …?oldid=…&diff=…. This is a typical use case when a user wants to compare possible duplicates.
Screenshot 1: The Lexemes statements are first, followed by "Lemma" and "lexical category". It should be the other way around, statements last.
Screenshot 2: The Forms statements are first, followed by "representations" and "grammatical feature". It should be the other way around, statements last.
Also note the inconsistent capitalization of the first characters, which might be worth another ticket.