I'm not experiencing this problem anymore but I'll leave some comments for others.
So, I've been searching around and it seems that ReloadTime() only works for "-prj" folder projects, until you close your QVW. After that, ReloadTime() fuction returns the minimum date (30-12-1899).
Anyway, my workaround for this was pretty simple. I edited my LoadScript and declared the following variable:
LET vLastDataReload = date(now(1));
//You can try it out without "date()"; just use "now(1)";
Now, I use my variable instead of ReloadTime().