this isn't even necessarily a buff, its more so a question of "what the hell?"... if you're using a solar shield, apparently you don't get light quanta with the sanctuary card in play, so... yeah. Is this a purposeful quality of the card, or is it some sort of design flaw? (I refuse to believe its a bug, since the solar shield does in fact, change your quanta pool, during your opponents turn, but still... seriously?)
Both cards are working exactly as intended, and as described on the cards. Therefore, it is by design that way.
It is not a bug, it is a feature -- It's working as intended!