the overwelming problem with "My text"

Hi, this app is super usuful and convinient in watching foreign videos. However, when it comes to reading it is :(. if I am reading my text and leaving it at that state, once I reopen my text, I have to read from beginning, not the place I had arrived, I found this so exuasting, I have to find the point I came through so much phrase:(, and also I couldn’t add my own books, I was going to use this site instead of LingQ or ReadLang, but the problem isn’t endurable