I updated to R208, and ran Anti-Venom, Medusa, Ragnarok. All their healing added to the bar which continued to show as all red (like true heal) but the healing was all burst, so after the match ended I had far less health than I had at the end of the match (I was healing a lot with that group).
Players will confused by this if it is left in game as is, as some characters true heal, but most burst heal.
For a minute I got excited, thinking Anti-Venom had gotten a stealth buff.