Flash barrier bug
flash barrier will deflect your own projectiles fired within the shield as if they were shot into it from outside. this has repeatedly gotten my killed by preventing my shot from hitting an armored warmonger that is walking into the barrier. my shot bounces off my barrier from inside it, then the warmonger doesn't get hit, so doesn't get stunned, so i die.
this issue also stops you from breaking traps that are farther away as well.