Speed Bug:
Extra turns are granted when they shouldn't be: If two dragons with the same speed value are facing each other, one of them may randomly gain extra turns, disrupting the expected turn order.
[TBC]It also appears that some skins of HVIP dragons make them faster or slower, even though there is no mention of this effect anywhere.
Arena chest and trophy count bug:
If the last dragon is defeated by damage from "Plasma Parasite" or "Ruling Parasite", the defeat is not counted toward the Arena chest or trophy rewards.
Hypershot bug:
The "Hyper Shot" passive does not trigger if the critical hit was done by these skills:
Spiked Raptor – Skill Skin:
Still gives an unintended +20% Health boost. May be a shadow buff, as it's happened before.
Visual Bugs
Karma absorption bug:
The absorption visual effect appears even when no absorption occurs.
Shield bug:
If a dragon with a "Shield" passive takes a bench hit (or sometimes on multi-hits) that destroys its shield, the shield may appear to twinkle (or look normal), even though it is no longer functional.
Damage pulse overlay bug:
Occasionally, some skills like "Turbo Shock" and "Hyper Shot" leaves the attacked dragon with a persistent white damage-pulse overlay.