Patch for https://github.com/remix-run/react-router/issues/12182 (credit goes to @ivan-pik)

@[email protected]

diff --git a/dist/router.js b/dist/router.js
index 23eae779e3ec2ea51933436ed18c9dbe43444797..013fb497f01728cdd3e3eb9b851ef4745bcfdad8 100644
--- a/dist/router.js
+++ b/dist/router.js
@@ -2981,28 +2981,30 @@ function createRouter(init) {
     if (blockerFunctions.size === 0) {
       return;
     }
-    // We ony support a single active blocker at the moment since we don't have
-    // any compelling use cases for multi-blocker yet
-    if (blockerFunctions.size > 1) {
-      warning(false, "A router only supports one blocker at a time");
-    }
+
     let entries = Array.from(blockerFunctions.entries());
-    let [blockerKey, blockerFunction] = entries[entries.length - 1];
-    let blocker = state.blockers.get(blockerKey);
-    if (blocker && blocker.state === "proceeding") {
-      // If the blocker is currently proceeding, we don't need to re-check
-      // it and can let this navigation continue
-      return;
-    }
-    // At this point, we know we're unblocked/blocked so we need to check the
-    // user-provided blocker function
-    if (blockerFunction({
-      currentLocation,
-      nextLocation,
-      historyAction
-    })) {
-      return blockerKey;
-    }
+
+    let blockingKey = undefined;
+
+    entries.some(entry => {
+      let [blockerKey, blockerFunction] = entry;
+      let blocker = state.blockers.get(blockerKey);
+
+      if (blocker && blocker.state === "proceeding") {
+        // If the blocker is currently proceeding, we don't need to re-check
+        // it and can let this navigation continue
+        return;
+      }
+
+      // At this point, we know we're unblocked/blocked so we need to check the
+      // user-provided blocker function
+      if (blockerFunction({ currentLocation, nextLocation, historyAction })) {
+        blockingKey = blockerKey;
+        return blockerKey;
+      }
+    })
+
+    return blockingKey;
   }
   function handleNavigational404(pathname) {
     let error = getInternalRouterError(404, {