At https://bugzilla.redhat.com/userprefs.cgi?tab=email Choose 'Enable All Mail' then 'Submit Changes' The changes to the component and voter column are lost.
QE can reproduce this bug.
Looking at the html source, this is likely related to the missing relationship id. Each checkbox html element has a name as email-0-1, where first number is the relationship id (table columns) and the second is the event id (table lines). Names for the Component and Voter columns lack relationship id, using element names of email--1. Voter used to be 4, Component is a new thing.
Verified on QA server
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