I am investigating any link to this mod.

Where did you download Surge and Bookshelf from? They shouldn't have -a at the end, unless you added that. BiblioCraft has some hacky rendering so it could be that mod, I don't know about furniture but it could be that one too. Bookshelf doesn't hack into rendering, or do any rendering so that can probably be cleared.

yes, those are my own personal file renaming.

Anything is possible, but I would say it's highly unlikely. Nearly all of the performance improvements in this mod happen while the game is loading, and none of our code is in the render loop.

Okay so of these mods which do you think could have been the cause?

** v0024 - Trying to fix openGL error try 2 **

** Mods Removed **
u-BiblioCraft[v2.4.5][MC1.12.2].jar
u-Bookshelf-1.12.2-2.3.567-a.jar
u-furniture-5.15.0-1.12.2-r.jar
u-Surge-1.12.2-2.0.76-a.jar

** Notes **
Trying to fix gl error.

The bug stopped after removing these 4 mods.

yes those are my own personal file renaming.