Mastiff lockjaw bug

I believe this might be a bug. When fighting one mob I bit until lockjaw hit close to the death of the mob. After it died I moved to the next and I could not bite or worry due to the fact that it still thought I was locked onto the first (dead) mob. Here is a quick log: You bury your teeth in Ralen's body. You clamp down tightly, locking your jaw onto Ralen. Your bite hits Ralen. Ralen is convulsing on the ground. <59%hp 71%m 99%mv 4408tnl (10 AM)> Ralen's magic misses you. Your claw injures Ralen. Ralen is DEAD!! You receive 355 experience points (35% bonus). Ralen splatters blood on your armor. You can't pick anything up. The gods give you 10 copper coins for your sacrifice of the corpse of Ralen. <59%hp 71%m 99%mv 4053tnl (10 AM)> af s s You can shapeshift into the following: Form Family Attack Type Skill Level 15: Mastiff canine claw Competent <59%hp 71%m 99%mv 4053tnl (10 AM)> You are affected by: Spell: 'detect invis' for a short time. Spell: 'aura' modifies armor class for a short time. Physical effect: 'lockjaw' for a short time. Spell: 'mystical shield of Khardrath' modifies armor class for a very short time. Spell: 'shield' modifies armor class for a very short time. Spell: 'detect magic' for a very short time. <59%hp 71%m 99%mv 4053tnl (10 AM)> The Alchemist's Lab [Exits: north east south] <59%hp 71%m 99%mv 4053tnl (10 AM)> Amidst Shelves Filled With Mechanical Equipment [Exits: north east south] A large golem made of clay is standing here. <59%hp 71%m 98%mv 4053tnl (10 AM)> e sAmidst Shelves Filled With Mechanical Equipment [Exits: north east south west] (Magical) A short wand made of frost-covered steel lies here. <59%hp 71%m 98%mv 4053tnl (10 AM)> s eAmidst Shelves Filled With Mechanical Equipment [Exits: north east west] (Magical) A heavy sledge hammer lies here. A shoddy haversack has been abandoned here. A vest of padded armor lies unused here. <59%hp 71%m 98%mv 4053tnl (10 AM)> e Portal of Living Stone [Exits: north east west] A pile of copper coins. A pile of silver coins. (Magical) A white chunk of marble lies here. A svirfnebli runic magician named Finglemin is stamping runes on the portal. Spriggis focuses his energy, keeping the earth portal open. (Invis) A svirfnebli geomancer named Rittlesmox is channeling earth energy into the portal here. <59%hp 71%m 97%mv 4053tnl (10 AM)> k fingle Your claw injures Finglemin. Finglemin has a few scratches. <59%hp 71%m 97%mv 4053tnl (10 AM)> Finglemin's magic misses you. Your claw wounds Finglemin. Your claw wounds Finglemin. Your claw wounds Finglemin. Finglemin has a few scratches. <59%hp 71%m 97%mv 4053tnl (10 AM)> #3 bite;wher You cannot bite while your jaws are locked on someone. Finglemin's magic misses you. Your claw injures Finglemin. Your claw injures Finglemin. Finglemin has some small but disgusting cuts. <59%hp 71%m 97%mv 4053tnl (10 AM)> You cannot bite while your jaws are locked on someone. Finglemin has some small but disgusting cuts. <59%hp 71%m 97%mv 4053tnl (10 AM)> You cannot bite while your jaws are locked on someone.