On Wiktionary I tried to reply to the first comment in a deep thread. Another editor had used the outdent template part way through the thread to push future replies to the left side. My reply was placed immediately before the template (diff), rather than at the end where I had intended. (Correction diff for clarity.) I have found a similar problem with Wiktionary's look template.
I don't know how possible this would be to fix, but it was a problem I noticed.