>I use heavy wool bandage now (l30 druid), but is doesn't work well and I
> can't figure out why. The flesh heal stops after only a few seconds
> (1-2) en doesn't heal as much as heavy linnen used to do. My guess is
> that I get interrupted but the reason I want to flesh heal is that there
> are too many mobs on us anyway and I rather moonfire and perserve my
> (run out of) mana for some rejuvination and regrowth later on in the
> battle.
>
> Also, does an interrupted heal spell cost the caster mana?

At level 30 you should be using heavy silk bandages if you want to heal any
decent amount, I'm level 29 and its what I'll be using once I get the book.
Wool is generally alot more valuable than silk, don't waste too much of it
on bandages.

A interrupted heal spell uses no mana, and if you haven't cast another spell
within 5 seconds you will continue to regenerate mana.

Maybe something is hitting you to interrupt it, also I have some mod that
announces when I am low on mana/health, but I only just realised that this
interrupts spells (channeled spells mainly, I never noticed it with casting
spells) it would also interrupt bandages since they are channeled.