For some reason when I have the Gilded Games Util 1.9 for 1.7.10) installed on my modpack (compatibility mod for Aether 2) I get weird lighting bugs commonly when I break blocks. When I break a block it leaves a very dark patch on the block next to it. It can be removed though by destroying the block or placing another one on it. Placing a torch near it gets rid of it too. Is it possible the Gilded Games Util .jar file I downloaded was defective or something? And if not, I was wondering if other people also had this issue.
P.S I've already tried the newer version of Gilded Games Util already (2.0) and it does fix the issue but it creates massive lag spikes for me so I reverted back to the 1.9 version.