According to Turnillo's data, the page is repeatedly visited with a rather specific bot. It can be easily fixed by adding that bot's UA to https://github.com/wikimedia/analytics-refinery-source/blob/master/refinery-core/src/main/java/org/wikimedia/analytics/refinery/core/Webrequest.java#L116.
|Open||None||T138207 [Open question] Improve bot identification at scale|
|Resolved||None||T238357 Label high volume bot spikes in pageview data as automated traffic|
|Resolved||None||T239532 "Venuše (planeta)" on cs.wp has surprisingly high numbers in Pageviews Analysis (and also Topviews Analysis)|