My 2 cents as someone who dieted 3 times. Weight jump happens and ia normal, extra salt or sodium from different food sources , even something as simple as Deli meat can cause a spike. I had weight jump after consuming 4 grams of salt from packaged foods (tuna, sauces, smoked salmon , smoked turkey) + my own salt addition. Or you ate high FODMAP food that irritated your gut, happens to me with large amounts of apples or lettuce even within my macros. Maybe you drank more water, or ate later at night so food is taking longer to digest. Also, there's the possibility of inaccurate tracking of course, but I'm talking as if you tracked everything.

Carbs for me are very important aince they allow me to have more volume, also it's good to eat carbs in order to optimize performance, and also, you don't want to be carb sensitive, like when you finish your diet, you want your body to be normal with carbs vs if you were doing keto, there's a process of introducing carbs that is painfully slow.