The side menu bar(sticky) is overflowing unless I scroll

I am building a React app with a MainLayout component that sets consistent padding for all pages using utility classes (e.g., Tailwind CSS). Here is my MainLayout code:

import React from "react";
import Navbar from "./Navbar";
import { Outlet } from "react-router-dom";

function MainLayout() {
  return (
    // <div className="px-4 md:px-24 lg:px-32 xl:px-42 2xl:px-60">
    <div className="px-4 md:px-8 lg:px-16 lx:px-32 2xl:px-64">
      <Navbar />
      <Outlet />
    </div>
  );
}

export default MainLayout;

On one of my pages, PostListPage, I have a FilterSideMenu component that appears alongside a list of posts. Here’s the PostListPage layout:

import React, { useState } from "react";
import PostList from "../components/PostList";
import FilterSideMenu from "../components/FilterSideMenu";

function PostListPage() {
  const [open, setOpen] = useState(false);
  return (
    <>
      <div className="mb-10 mt-6">
        <h1 className="text-2xl mb-6">Example Blog</h1>

        <button
          onClick={() => setOpen((prev) => !prev)}
          className="bg-secondaryColor px-4 py-2 md:hidden mt-6 mb-6 rounded-lg dark:text-black"
        >
          {open ? "Close" : "Filter or Search"}
        </button>

        <div className="flex flex-col-reverse gap-8 md:flex-row justify-between">
          <div>
            <PostList />
          </div>
          <div className={`${open ? "block" : "hidden"} md:block`}>
            <FilterSideMenu />
          </div>
        </div>
      </div>
    </>
  );
}

export default PostListPage;

And here’s the FilterSideMenu:

import React from "react";
import { Link } from "react-router-dom";
import Search from "./Search";

function FilterSideMenu() {
  return (
    <div className="px-6 h-max sticky top-10 dark:bg-gray-600 bg-gray-100 p-4 rounded-2xl">
      <div className="flex flex-col gap-8">
        <div>
          <span className="font-medium mb-2 block">Search</span>
          <Search />
        </div>
        <div className="flex flex-row md:gap-4 md:flex-col gap-32">
          <div>
            <span className="font-medium">Filter</span>
            <div className="flex flex-col gap-2 mt-2 text-sm">
              <label
                htmlFor="newest"
                className="flex items-center gap-2 cursor-pointer"
              >
                <input
                  type="radio"
                  id="newest"
                  name="sort"
                  value="newest"
                  className="w-4 h-4 rounded-sm border-[1.5px] appearance-none checked:bg-secondaryColor border-black dark:border-gray-300"
                />
                Newest
              </label>
              <label
                htmlFor=""
                name="sort"
                value="popular"
                className="flex items-center gap-2 cursor-pointer"
              >
                <input
                  type="radio"
                  className="w-4 h-4 rounded-sm border-[1.5px] appearance-none checked:bg-secondaryColor border-black dark:border-gray-300"
                />
                Most Popular
              </label>
              <label
                htmlFor=""
                name="sort"
                value="trending"
                className="flex items-center gap-2 cursor-pointer "
              >
                <input
                  type="radio"
                  className="w-4 h-4 rounded-sm border-[1.5px] appearance-none checked:bg-secondaryColor border-black dark:border-gray-300"
                />
                Trending
              </label>
              <label
                htmlFor=""
                name="sort"
                value="oldest"
                className="flex items-center gap-2 cursor-pointer "
              >
                <input
                  type="radio"
                  className="w-4 h-4 rounded-sm border-[1.5px] appearance-none checked:bg-secondaryColor border-black dark:border-gray-300"
                />
                Oldest
              </label>
            </div>
          </div>
          <div className="">
            <span className="font-medium">Categories</span>
            <div className="flex flex-col underline gap-2 mt-4 text-sm">
              <Link to="/posts?cat=all">All</Link>
              <Link to="/posts?cat=categ1">Categ1</Link>
              <Link to="/posts?cat=categ1">Categ2</Link>
              <Link to="/posts?cat=categ1">Categ3</Link>
              <Link to="/posts?cat=categ1">Categ4</Link>
            </div>
          </div>
        </div>
      </div>
    </div>
  );
}

export default FilterSideMenu;

The issue arises when I visit the /posts page. The sidebar (FilterSideMenu) initially appears outside the viewport horizontally, but after I scroll a bit, it adjusts itself and comes inside the viewport. The expected behavior is that it should respect the padding defined in MainLayout (px-4 md:px-8 lg:px-16 lx:px-32 2xl:px-64) right from the beginning.

Verified that the FilterSideMenu component is wrapped inside the MainLayout’s padding.
Checked the CSS classes and styles for conflicting margins or padding.
Used browser developer tools to observe layout behavior and noticed that the issue resolves after a slight scroll, indicating a potential reflow/repaint issue.

The FilterSideMenu should respect the padding applied by MainLayout immediately when the page loads, without requiring a scroll.