In the last two versions (2.3.3 & 2.3.4) of the Redirection plugin the pagination on the ‘Group’ pages seems to be missing and completely ignored. This causes a memory leak on sites with many redirects resulting in a mid page crash making the plugin unusable.
The issue seems to be in the file ‘modesl/redirect.php’ around line 132. In version 2.3.2 there still was a pager attached to this query, in the later versions this pager has been removed.