Receiving negative damage causes golden heart bug

The bug

When the player is hit by an enemy that deals negative damage, the golden heart bug (MCPE-56836) appears. Whether negative damage is the source of MCPE-56836 is unknown, but it's a 100% reliable way of experiencing an identical effect.

How to reproduce

1. Download the attached world
2. Get attacked by the zombie repeatedly (behavior pack changes zombie attack damage to -1)
   → Your health gets buggy, absorption hearts appear from nowhere on the bottom row, etc

Expected result
Negative damage is treated the same as 0 damage