When Monocle shuts down, a Framebuffer object is created for the purpose of clearing the screen. In the constructor, a clearBuffer is allocated:

        if (clear) {
            clearBuffer = ByteBuffer.allocate(width * 4);
        }

The allocation assumes a 32 bit screen depth. This can result in a BufferOverflowException on exit on a 16 bit platform like the r-pi. The correct code should be:

        if (clear) {
            clearBuffer = ByteBuffer.allocate(width * byteDepth);
        }