Hi there, I've upgrade to 3.2.7, from 3.1.6 and I was now trying to clean some spam emails. So I go to ACP - Users and Groups - Prune Users and then I filled the fields:

Email with: *mail.ru
Joined After: 2019-01-01
Last Active: 0000-00-00
Deactivate or delete: Doesnt matter I tried both
 Clicked submit and then I saw a list of usernames. I had 1596 users on that list.
I clicked on Yes on confirmation, and the page was redirected to Prune Users page without deleting/deactivating any user :/