Talk:Excalibur (Warframe)/@comment-50.38.80.247-20150709102032/@comment-162.72.6.211-20150709104030

Here's how channeling works with EB waves. If you send out a wave while channeling and you stop channeling before it hits, you get no channeling bonuses and energy is not consumed. If you send out a wave while not channeling and start channeling as it hits enemies, channeling bonuses are granted and energy is consumed.

So my assumption here is that you sent of a wave then started channeling as it hit a crowd of enemies and your energy went bye-bye.