So this is an easy bug to replicate and it's a bit gamebreaking. All that needs to be done is apply deflection shield and insulation shield, then both people rezone, and reapply both shields, and it will apply new shields and give two stacks of the same bubble instead of refreshing the duration. As far as i'm aware this bug can be replicated infinitely, and it does apply full, non-diminished stats from each instance of the bubbles. The first picture was taken from grandville, then the second picture was taken after we switched to mercy. This can also be done by zoning into missions as well, and works through exemplaring. Please fix, quickly.
Edit: This also worked with grant invis, so it's possible it works for every type of low CD ally buff
Edit 2: Tested with sonic buffs and cold buffs, pretty sure this doe apply to all targeted buffs
