Text colors chosen in Flutter Flow do not appear in the published app!

Hello everyone.

I really need your help. I've published the app I'm developing, but when I open it, the color settings I applied do not appear. The texts are simply unreadable, most of them appear in light colors.

I don't know what's happening. On some pages, the background is white at one moment and black the next, without me having made any changes.

I've tried all day today to find a solution, without success.

Does anyone know what might be happening, and how I can fix this?

I am developing an app to relieve joint pain in people, but now with the app almost ready, I am facing this major problem when I publish it.

I appreciate any help you can provide. Thank you all.

I tried to disable dark mode to only use light mode, but the background still showed alternating colors, sometimes black, sometimes white.
I tried using "primary colors" for the text so that it would change according to the white/black background—I thought it was switching between dark/light mode. However, it didn't solve the issue; it keeps the same text color, but the backgrounds switch between white and black depending on when I access it.
I tried setting a fixed color—not a secondary or primary one—like #1E1E1E, almost black, but it insists on rendering it with a light font.
I make sure to adjust the colors of all the elements on the page.
I ensured that there were no overlapping elements.