This is just an idea:
Have you noticed that the image appears after resizing the window? This may tell you that the image is not loaded yet. I have no idea how you put the images there but if it’s a dynamical thing you may check first if the images are loaded.
It’s showing but not visible because the text is on top. Somehow the float is making the outer dimensions not being adhered to. I can only conclude it’s a bug related to the column. Have not found a solution, looked at it for quite a while.