There is certainly a confusing bug here we should get sorted.
I just blocked support.sqills.com and confirm it is doing what it is supposed to for https://support.sqills.com/browse/SCQI-934?1 https://support.sqills.com/browse/SCQI-934?1 but sadly https://support.sqills.com/browse/SCQI-934 is cached server side for 24 hours and rebuilding HTML is not busting the cache.
We will get this small niggle sorted out this week so we reduce support around this. Blocking redirect as an option sounds great to me, we may be able to squeeze this in. Maybe block onebox on cross domain redirect is better, or maybe that is too much fidelity… not sure.