diff --git a/XMOJ.user.js b/XMOJ.user.js
index 4c9d072c..a6a0c0b3 100644
--- a/XMOJ.user.js
+++ b/XMOJ.user.js
@@ -2269,23 +2269,22 @@ async function main() {
                             document.getElementsByTagName("h2")[0].innerHTML += " (" + pid + ")";
                         }
                         let ContestProblemList = localStorage.getItem("UserScript-Contest-" + SearchParams.get("cid") + "-ProblemList");
-                        if (ContestProblemList == null) {
-                            const contestReq = await fetch("https://www.xmoj.tech/contest.php?cid=" + SearchParams.get("cid"));
-                            const res = await contestReq.text();
-                            if (contestReq.status === 200 && res.indexOf("比赛尚未开始或私有，不能查看题目。") === -1) {
-                                const parser = new DOMParser();
-                                const dom = parser.parseFromString(res, "text/html");
-                                const rows = (dom.querySelector("#problemset > tbody")).rows;
-                                let problemList = [];
-                                for (let i = 0; i < rows.length; i++) {
-                                    problemList.push({
-                                        "title": rows[i].children[2].innerText,
-                                        "url": rows[i].children[2].children[0].href
-                                    });
-                                }
-                                localStorage.setItem("UserScript-Contest-" + SearchParams.get("cid") + "-ProblemList", JSON.stringify(problemList));
-                                ContestProblemList = JSON.stringify(problemList);
+                        ContestProblemList = null;
+                        const contestReq = await fetch("https://www.xmoj.tech/contest.php?cid=" + SearchParams.get("cid"));
+                        const res = await contestReq.text();
+                        if (contestReq.status === 200 && res.indexOf("比赛尚未开始或私有，不能查看题目。") === -1) {
+                            const parser = new DOMParser();
+                            const dom = parser.parseFromString(res, "text/html");
+                            const rows = (dom.querySelector("#problemset > tbody")).rows;
+                            let problemList = [];
+                            for (let i = 0; i < rows.length; i++) {
+                                problemList.push({
+                                    "title": rows[i].children[2].innerText,
+                                    "url": rows[i].children[2].children[0].href
+                                });
                             }
+                            localStorage.setItem("UserScript-Contest-" + SearchParams.get("cid") + "-ProblemList", JSON.stringify(problemList));
+                            ContestProblemList = JSON.stringify(problemList);
                         }
 
                         let problemSwitcher = document.createElement("div");