White and blue lines within blocks

Hi, I stopped playing Minecraft for a couple of years, but I wanted to check what new things Minecraft has now. When I first downloaded and opened it it ran well, I was checking the new buffet option of the world settings and everything was good. I closed the game, then reopened it a few hours later and decided to play in survival mode, this is when I notice the "glitch" or "bug" with the graphics. Many white and blue lines appear within the blocks and it is pretty annoying seeing them, I attached some images in which the white and blue lines appear. I tried every single combination of the graphics options and nothing fixed it. I'm surprised that this happened when I changed of laptop, I used to play it on Mac way worst that this new computer and tought it would run so much better here. Please help, Minecraft is a really good game and I really wanted to play it again like in the old times.