Describe the bug
Sometimes rarely there is a bug that skills you have assigned turns invisible and game's FPS drops pretty much to 1 or 0, it seems to happen so far completely randomly i believe?

To Reproduce
Steps to reproduce the behavior:
Unknown unfortunately

Expected behavior
That game wouldn't drop its FPS and skills wouldn't become invisible.

Screenshots
None

Desktop (please complete the following information):
•OS: Windows 7 Ultimate
•MC Version and Forge version: forge-14.23.5.2815 Minecraft 1.12.2
•Version AcademyCraft 1.1.1

Additional context

My log was abolutely filled with these
[15:58:43] [Client thread/ERROR]: ########## GL ERROR ##########
[15:58:43] [Client thread/ERROR]: @ Post render
[15:58:43] [Client thread/ERROR]: 1284: Stack underflow
[15:58:43] [Client thread/ERROR]: [CPBar] GL error @ DrawCPBar
[15:58:43] [Client thread/ERROR]: ########## GL ERROR ##########
[15:58:43] [Client thread/ERROR]: @ Post render
[15:58:43] [Client thread/ERROR]: 1284: Stack underflow
[15:58:43] [Client thread/ERROR]: [CGUI] Error while rendering Unnamed 0: 1283/Stack overflow

So i am not sure if this may be any help, but if it is, i hope it can be fixed, the CPBar made me thinkk it might be because of this mod aswell..

checked my logs.

It seems that it spams 60 times per second in the logs. It's either:

[22:28:01] [Client thread/ERROR]: [CPBar] GL error @ DrawCPBar
[22:28:01] [Client thread/ERROR]: ########## GL ERROR ##########
[22:28:01] [Client thread/ERROR]: @ Post render
[22:28:01] [Client thread/ERROR]: 1284: Stack underflow

or

[00:00:00] [Client thread/ERROR]: [CGUI] Error while rendering Unnamed 1: 1283/Stack overflow
[00:00:00] [Client thread/ERROR]: ########## GL ERROR ##########
[00:00:00] [Client thread/ERROR]: @ Post render
[00:00:00] [Client thread/ERROR]: 1284: Stack underflow

It could be anything in the pack though.