chore(hooks): disable refetch on mount for all problems

  ## what
  - disable refetch on mount for `all problems`

  ## how

  ## why

  ## where
  - ./src/hooks/index.ts

  ## usage

src/hooks/index.ts

@@ -91,6 +91,7 @@ export const useFetchProblems = () => {
     queryFn: async () =>
       axios.get<Problem[]>("/api/problems").then((res) => res.data),
     refetchOnWindowFocus: false,
+    refetchOnMount: false,
   });
 };