Hello @andfanilo and @Taylor_Hutyra
I am facing the same issue. I added a snippet at Streamlit Discussions and at Github
I have a multipage app with the main entry as main.py and a number of pages titled [01_calibrate.py, 02_label.py, …etc] all located in a pages subfolder placed with the main.py file in an app folder. When I put the above referenced snippet in main.py it works. When I put it in any of the pages, the background_color works (it is initialized to black), but when I load a background_image, the image is not shown and a white background is shown instead (can’t tell if it is a white background or a transparent one resetting the background_color, but it doesn’t relate much, since the problem is that the background_image is not shown).
I appreciate your help.