Casting a spell then resting

I have only tested this with rolling flame in the endless paths dungeon:

Since rolling flame can be cast outside of combat, right before engaging Zolla's room I decided to start the fight by casting rolling flame from off-screen. After casting it, I noticed my fighter was at half-health, so I decided to rest.

I was somewhat surprised that the rolling flame spell was nice enough to stick around mid-roll until I was done resting, effectively giving my wizard an extra 2nd level spell. It seems to me that when resting, all active spell effects should be cleared away. [And really, resting while you are hiding within sight of an enemy shouldn't be possible either...]