SDL image only shows occasionally - c++

Question

The code below is meant to show a picture of a rider in the top left corner of the SDL window. With this code the image occasionally does appear as intended, but most of the time when I run the program I just get a black window. Any idea why?
#include "Game.h"
#include <iostream>
bool Game::init(const char* title, int xpos, int ypos, int width, int height, bool fullScreen)
{
int flags = 0;
if (fullScreen)
{
flags = SDL_WINDOW_FULLSCREEN;
}
//attempt to initialize SDL
if (SDL_Init(SDL_INIT_EVERYTHING)==0) {
std::cout << "SDL init success \n";
//init the window
m_pWindow = SDL_CreateWindow(title, xpos, ypos, width, height, flags);
if (m_pWindow !=0) // window init successful
{
std::cout << "Window creation successful\n";
m_pRenderer = SDL_CreateRenderer(m_pWindow, -1, 0);
if(m_pRenderer !=0) // renderer init success
{
std::cout << "renderer creation successful\n";
SDL_SetRenderDrawColor(m_pRenderer, 0, 0, 0, 255);
}
else
{
std::cout << "renderer init failed!\n";
return false; // render init failed
}
}
else
{
std::cout << "Window init failed!\n";
return false; //window init failed
}
}
else
{
std::cout << "SDL init failed!\n";
return false; // SDL init failed
}
std::cout << "Init success\n";
m_bRunning = true; // everything init-d successfully, main game loop running
SDL_Surface* pTempSurface = SDL_LoadBMP("rider.bmp");
if(!pTempSurface)
{
std::cout << "Error, tempsurface is null";
}
m_pTexture = SDL_CreateTextureFromSurface(m_pRenderer, pTempSurface);
SDL_FreeSurface(pTempSurface);
SDL_QueryTexture(m_pTexture, NULL, NULL, &m_sourceRectangle.w, &m_sourceRectangle.h);
m_destinationRectangle.x = m_sourceRectangle.x = 0;
m_destinationRectangle.x = m_sourceRectangle.x = 0;
m_destinationRectangle.h = m_sourceRectangle.h;
m_destinationRectangle.w = m_sourceRectangle.w;
return true;
}
void Game::render()
{
SDL_RenderClear(m_pRenderer); // clear the renderer to the draw color
SDL_RenderCopy(m_pRenderer, m_pTexture, &m_sourceRectangle, &m_destinationRectangle);
SDL_RenderPresent(m_pRenderer);
}
void Game::handleEvents()
{
SDL_Event event;
if (SDL_PollEvent(&event))
{
switch (event.type)
{
case SDL_QUIT:
m_bRunning = false;
break;
default:
break;
}
}
}
void Game::clean()
{
std::cout << "cleaning app\n";
SDL_DestroyWindow(m_pWindow);
SDL_DestroyRenderer(m_pRenderer);
SDL_Quit();
}