I have discovered that from time to time after saving and loading I loose bonuses from my shards for all buff spells, e.g., stoneskin.

For instance I have 9 shards so it gives bonus +30 to defense, sometimes after loading it shows + 3. At this moment all spells are reset: evoke, burning blade etc. and suddenly do not show any bonuses from shards. I failed yet to discover when precisely or why does it happen, but it happened to me now third time in two games .. Very, very annoying and mana expensive to recast 10 buffs ...

Qeustion: is it bug that or intended that when you get a new shard the bonus from buffs is not refreshed, but it remains the same as at the moment of casting.