This is normally seen when combined with other mods that manage optimizations (such as Immediately Fast) but can occur without it. Often presenting as the entire render engine dying until the game is closed and opened again. (complete black screen, menus cant be seen, hand cant be seen). I have also seen situations where the entire screen turns white; just generally indefined behavior.

These should have a sparkleBuffer.bind() before them and a VertexBuffer.unbind() after them.