What is half of 255 in RIot world? 255 - Executioner's Calling is broken

Executioner's Calling (EC) is a great item against continually healing champions. This includes a champ like Mundo. Inst ad of applying normally, EC decides to skip any healing on a target afflicted by physical damage. Perfect example is a fight where I was doing damage right up to the point I died and Triumph restored 12% of his health a second after my death. That was 255, which is 12% of 2125 heath, an appropriate amount of health for a Mundo at level 11. However, EC should have reduced this to 126 rounding up.

One might suggest that the healing was possibly 510 (255 * 2) but that would mean a level 11 Mundo was at 4250 hp. Insane with just 2 items. Actually he had a Sterak's gauge which made 4250 hp impossible without the shield counting.

With health at 2125 the health gain was not reduced by EC, then by all definitions this is a bug. I assume then that all healing was not reduced by EC which makes this a broken in game item and needs to be fixed asap.

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