Bug Poison appying to other characters

I've had several characters give poison damage when another character has applied poison to their weapon 

Eg. Angharad (rogue Darkweaver) applies poison to her bow, shoots wolf wolf dies of piercing damage

Alaw (Sun Cleric) shoots other wolf with crossbow misses

Alwena attacks wolf with firebolt wolf sustains fire and poison damage

Anwyn attacks wolf with Scimitar wolf sustains slashing damage

Alaw attacks wolf with scorching ray, wolf sustain fire and poison damage.

I will email with a save