Samsung S8+ forced full screen after update and in-game UI size changes

On my Samsung S8+ I have the option to use certain Apps in Full Screen mode (which basically means it will take up even more of the screen than usual). But I chose to toggle the full screen option off for Battle Bay, because it felt a little awkward to me. After the update, I have no ability to toggle this full screen mode off, and in addition to this, all the icons in-game (weapon icons, joystick, etc.) are much smaller than they were before the update- and smaller than they are shown in the customization UI- despite the fact that I have them turned up in the options. Is this intended? This is affecting my gameplay greatly because I have thousands of games played with my old settings, and now due to factors beyond my control, my settings have been altered. Please address these issues, or let me know if there is something I can do to fix them. Thanks.

 

Could I get some response on this please? I don't understand why the update was accompanied by these QOL changes. I'm trying to stay in nightmare league, and this is making it difficult.

Edit: To be clear, I believe the UI settings changed because of the full screen thing, that's why I brought it up. I hadn't reinstalled the game or changed my settings or anything, this happened after the update, and I had no say over the matter.