Flame Breath causes inability to cast if interrupted

If you're in Flame Breath flight and get frozen/heavy stunned/etc. out of your channel, 10/10 times you get stuck unable to cast anything. Eventually with enough mashing and a valid target, the game will allow you to cast Wing Blast, presumably because it can interrupt other skills, but I'm often stuck for 5+ seconds running around helpless when this happens. This also happens rarely when releasing Flame Breath normally for an unknown, unrelated reason, but is functionally guaranteed when interrupted by an immobilizing effect.

Steps to reproduce:

1. Channel Flame Breath
2. Get hit by the appropriate damage type until stunned or frozen
3. Wait for immobilize to end
4. Attempt to cast abilities - you will not be able to.