[PS4] ISIC Final Phase Unkillable

During a co-op match on The Algorithm, myself (El Dragon) and two public matchups (a Reyna and a Benedict) got to the final phase of the ISIC fight. Upon dropping his health to zero, his boss health bar began refilling white as he took additional damage past zero health. The fight would not end, even after filling the entire bar back up with damage. Do not know what could have triggered this unless it had something to do with the boss fight being played after Midnight EST for 4/18. Which would be kind of dumb.