Life Tool + Destruction Tool not cleared from battlefield

[Zomis]

If you kill a "Life Tool" or a "Destruction Tool", they do not get cleared from the battlefield.

Possibly related to these console errors:

cardshifter.js:7562 Uncaught TypeError: Cannot read property 'entities' of null
cardshifter.js:7453 Uncaught TypeError: Cannot read property 'ATTACK' of undefined
cardshifter.js:7453 Uncaught TypeError: Cannot read property 'HEALTH' of undefined

[Zomis]

The Cannot read property 'ATTACK/HEALTH' of undefined errors happens when opponent summons a creature (such as "Life Tool") and you have a card that changes its attack or health.

Server sends:

• ZoneChangeMessage [entity=176, sourceZone=-1, destinationZone=118]
• UpdateMessage [id=176, key=ATTACK, value=-1]
• CardInfo: 176 in zone 118 - {flavor=Restores life., MAX_HEALTH=3, MANA_UPKEEP=0, imagePath=mythos/chinese/life-tool.jpg, SICKNESS=1, effect=Heal 1 to you at end of your turn, name=Life Tool, ATTACK=-1, creatureType=Chinese, HEALTH=3, ATTACK_AVAILABLE=1}