On Thai Wikipedia, the abuse filter #22 reads
!('bot' in user_groups) & added_links rlike "wikipedia.org"
The action for this filter is to label the edit.
The edit http://th.wikipedia.org/w/index.php?title=%E0%B9%81%E0%B8%A1%E0%B9%88%E0%B9%81%E0%B8%9A%E0%B8%9A%3AWebCite&diff=4663859&oldid=4663855 clear doesn't fall into the filter condition but the edit was nevertheless labelled by AbuseFilter.
We (two programmers on Thai Wikipedia and I) tried to repeat the edit but the filter does not take an action on the same edit. Therefore, we conclude that it is not reproducible. However, it is recorded on Thai Wikipedia and you can investigate it from available logs.