[iOS & Android] Line auto-login opens "redirect_uri" in a new tab

I open my web app in a tab of an external browser e.g. safari and chrome in a mobile device (iOS or Android). When login with line, the browser switches to Line app then switches back to the browser again. Now, the "redirect_uri" is opened in a new tab resulting in 2 opening tabs for my web app.

I need Line app to open the "redirect_uri" in the same tab that my web app was previously opened.

Would you have a suggestion ?

Thanks.