water breathing spell disappears for no reason...

[100%hp 96%m 85%mv] 7 AM 97.38% [civilized/standing/sober] af You are affected by: Spell: 'water breathing' for 22 hours. Spell: 'giant strength' modifies strength by 3 for 13 hours. Spell: 'fly' for 7 hours. Spell: 'detect invis' for 6 hours. Spell: 'pass door' for 4 hours. Skill: 'detect evil' for -1 hours. [100%hp 96%m 85%mv] 7 AM 97.38% [civilized/standing/sober] The Catacombs [Exits: south west] Wild and disheveled looking, a middle-aged man in black silk robes stumbles through the catacombs. [100%hp 96%m 84%mv] 7 AM 97.38% [civilized/standing/sober] af You are affected by: Spell: 'water breathing' for 22 hours. Spell: 'giant strength' modifies strength by 3 for 13 hours. Spell: 'fly' for 7 hours. Spell: 'detect invis' for 6 hours. Spell: 'pass door' for 4 hours. Skill: 'detect evil' for -1 hours. [100%hp 96%m 84%mv] 7 AM 97.38% [civilized/standing/sober] af The Catacombs [Exits: north east south] [100%hp 96%m 84%mv] 7 AM 97.38% [civilized/standing/sober] You are affected by: Spell: 'giant strength' modifies strength by 3 for 13 hours. Spell: 'fly' for 7 hours. Spell: 'detect invis' for 6 hours. Spell: 'pass door' for 4 hours. Skill: 'detect evil' for -1 hours. ***I kept noticing my 'water breathing' spell wasn't up after I'd cast it just a few moments ago. So I retraced my steps back to the T-intersection just east of Mariara in Loch Grynmear(sp) and every so often my spell would disappear at this spot.***