Gully’s ability Barrier Swing reads that it deals damage and converts 75% of it into a shield which is “applied to the most damaged hero at the time.”
This is not working as intended. Currently it applies to whichever hero currently has the lowest health at the time, regardless of whether they are damaged.
If your Gully is at 600/1400 HP, she is currently damaged by 800, but if you Garrison is at 580/580, the shield would go onto him, even though he is at full health.
Replicability - 10/10
This is extremely frustrating for Gully’s playstyle. If you are using her as a taunting tank, and you are attempting to sustain through high single-target damage, clearly you want the shield to apply to Gully, not the squishy who cannot even take damage because of taunt. Not only that, but later in her perk tree, Gully receives large bonuses when she has a shield on her, something which will be negatively affected by this bug.