Redirect users to the last page visited, after login from component

You will firstly need to create a Template Override for the following file:

components/com_users/views/login/tmpl/default_login.php

Once done, open the following file (your override):

templates/MY_TEMPLATE/html/com_users/login/default_login.php

and go to line 81, where you will see the following code:

<input type="hidden" name="return" value="<?php echo base64_encode($this->params->get('login_redirect_url', $this->form->getValue('return'))); ?>" />

and replace it with:

<input type="hidden" name="return" value="<?php echo base64_encode($_SERVER['HTTP_REFERER']); ?>" />

Hope this helps