Whenever you move your cursor, it will turn into a static color, you cannot exit to menu nor interact with the world until you get back to your original curser point when logged in. This was right after I installed the new versions for mekanism, mekanism generators and mekanism tools

• Confirmed not Codechickenlib
• Confirmed Not Sponge
• Confirmed not multiplayer-only (the same issue in singleplayer)

below is the twitch modpack as well as the world:
https://mega.nz/#!mbRRTCSJ!7f4tIp1tAXZWTxEutZxi_j_pb2oMaQ7V1v6xUsbIhnA
and, the logs are here as well :)
2019-07-23-7.log.gz
and... the video of the example
Minecraft 1.12.2 2019-07-23 21-46-52.zip

Will look into this more tomorrow, but removing buildcraft seems to fix this issue.

Still need to try and track down why it is happening and which end it is on, but in BetterFPS changing Fog from Fast to Fancy seems to make it work properly.

I think this may have to do with us "enabling fog" on this line https://github.com/mekanism/Mekanism/blob/1.12/src/main/java/mekanism/client/render/RenderResizableCuboid.java#L179 (this gets called by the dynamic tank rendering). I am not quite sure what is the point of our call to enabling fog there, so I will talk with @thiakil and see if he knows why the method enables fog.

Fix included in 9.8.1