Dude, this has never happened to me. Maybe it's because you leave it in BRL, I only leave it in USD.

In an image it says that the price of my balance
In bitcoin is 439 reais

When I go to confirm, only the value of 405 reais appears

I invested 400 when bitcoin was worth 595 thousand reais

Now worth 670 thousand reais, it seems like I will withdraw the same amount???

I am a beginner on the platform but I am already finding it very lack of transparency