In the backend when I try to filter the k2 items by category, featured state, current/trashed, user, publishing state, or language it redirects me to /administrator/index.php

Filtering of categories by category, current/trashed, publishing state, or language works fine. Filtering of Tags works fine. Filtering of Users works fine.

J 3.6.4
K2 2.7.1

screencast: drive.google.com/file/d/0ByW6mKRcAxsCZ3V3NDJPTEdaT2s/view

Does anyone know why filtering of items is not working and how to resolve it?

Are you using any other K2 related extensions?
Which other extensions are you using?

I figured out that it was happening only when the list limit was set to All.

So joomla/k2 can't handle filtering of ALL items.

It comes down to ALL.
If ALL is close to thousands then Joomla!/ K2 might be able to handled it but I doubt more servers can.