I can think of 4 things this could be.
1. It's just the wick/coil break in taste. If so it shall pass. Try mouth puffing it, no inhales till it gets better.
2. Some coils come with factory GUNK on them, If so it shall pass. Try mouth puffing it, no inhales till it gets better.
3. The wick got very burnt, it shall not pass.
4. You are vaping sock flavored juice. Give Dobby back his bottle of juice!