Meditation Bug

[Fatt_Shade]

There is other ways to get mana during battles.
You mistaken meditation with concentration. Meditation regenerates mana outside battle faster. Lets say without it, you get 1 mana point for every 30 minutes daytime in game, with meditation you get 1 mana every 15 minutes . . .
As for concentration it gives you mana/battle turn. But no matter what you have mana will stop generating after 20 turn, so you`ll have to fight with mana you got before that time.
Transmutate gives you mana for every killed stack of units (whole stack, or illusion casted during fight), depending of skill lvl. Also you get same with Mana belt item 2 mana point every battle turn.
Other ways : calm rage spell, magic spring, green dragon talent.
So in the end, for you`re comment : mana generation is set by default to stop after 20 battle turns and meditation have nothing to do with mana in battle, but outside it (when you ride around). If you want more mana in battles, invest runes in concentration,transmutate skills, or use spells i mentioned.