In the MinecraftClient class, the openScreen method has a new call added to

BufferRenderer.unbindAll();  We have a mod that calls the openScreen method to implement a cross server 'vault' from the Netty Client IO thread.  This results in an exception in the RenderSystem class (IllegalStateException("Rendersystem called from wrong thread").  We can get around the issue by using a Mixin to overide the openScreen method, but I'm wondering if there is another, more proper way to do this.  Or is this a bug?