Minecraft in Xbox lags when opening it's keyboard or when receiving a notification

Basically, when you open the chat or a sign, you need your keyboard, right? That keyboard that appears on the screen. So, when you open the keyboard so you can type, the game literally starts lagging, and that's an annoying issue. So, without vibrant visuals, the fps will reduce a little and then come back a few secs, but when I use vibrant visuals, the fps is like 5 fps and takes more longer to get the fps back, so, I think this is a new bug related to the fog, I guess, because I was outside and when I opened the keyboard the fog reduced it's level and when I closed my keyboard, the fog was coming back to it's level and the game was lagging until the fog came back to it's default level. So, please fix this.