Egress doing nothing on completion

[Darklung]

On a couple of occasions now I've cast Egress with my druid and while getting no fizzle or interrupt messages, had nothing happen after it finished casting.

Has happened in combat and out of combat and in different zones.

Interrupts are going to happen. Fizzles are going to happen. You're going to die because of them. But this isn't cool when it happens for no apparent reason.