Bug With 'Bravery' Spell
 

https://wiki.project1999.com/Bravery

If I cast this spell on myself while the current bravery buff is fade flashing, then the new buff also fades immediately.

http://i.imgur.com/pBCEJ8N.jpg

After testing this a few times, I could not get it to repeat. Yet

You have to time the buff to land when the old one fades, not sure about the length of the window, shorter than the last buff tick, maybe the same second or the same server frame. Remembering it happen rarely on live too

Seems to happen with all sorts of buffs (and presumably debuffs).

It's actually somewhat easy to replicate by spamming yaulp due to the short duration and low cast time. Annoying quirk that also prevents 100% absentmindedness.