On itwiki we noticed that sometimes diffs are wrong, showing a moved line while they shouldn't and thus conflicting with the actual page content. For instance, there are this and this diff which made me think of a problem with content model, but then this diff came up on an article. Specifically, in this last diff you can see the line
| data giappone = 30 ottobre 2015<ref name="firstvolume" />
moved down, after
| data italia = 11 aprile 2018<ref name="firstvolumeit" />
while if you check the actual article text you see that the diff is completely wrong.