Granted I have not spent a lot of time in Grauburg, but I have only encoutered the following glitches in Attohwa Chasm.

Periodically you will recives a message wherein all of your enchantment effects, atma and visitant statule will wear off when it has not. Regardless of your time remaining. This is just superficial.

The more problematic glitch is, when having capped azure light, ocassional chests will have minimal potentcy. I.e. An XP chest will only have 200 instead of 1200 or an item chest will have single items in it instead of multiple for everyone.