Most of the time I get "504 Gateway Time-out" if I try to get the oldest abuse filter modification(s) using the API (try the URL above). The analogous query without "&ledir=newer" works perfectly.
Version: 1.22.0
Severity: normal
URL: https://en.wikipedia.org/w/api.php?action=query&list=logevents&format=jsonfm&leprop=ids|title|type|user|userid|timestamp|comment|parsedcomment|details|tags&leaction=abusefilter/modify&ledir=newer&lelimit=1