Unable to batch edit over 50 pages

I try to back edit beyond 50*200 pages.
Page 51 gives Too many results. Try using smaller searches or the id_above parameter.

https://www.inaturalist.org/observations/efmer?filter_spam=false&page=51&preferences%5Bper_page%5D=200&user_id=750774&utf8=✓&viewer=750774
Just fails, page 50 works fine.