diff --git a/dom/workers/WorkerPrivate.cpp b/dom/workers/WorkerPrivate.cpp
index 43c622cb6b9d..29a2da5907c9 100644
--- a/dom/workers/WorkerPrivate.cpp
+++ b/dom/workers/WorkerPrivate.cpp
@@ -2764,6 +2764,12 @@ void WorkerPrivate::DoRunLoop(JSContext* aCx) {
              !(debuggerRunnablesPending = !mDebuggerQueue.IsEmpty()) &&
              !(normalRunnablesPending = NS_HasPendingEvents(mThread)) &&
              !(mStatus != Running && !HasActiveWorkerRefs())) {
+        // We pop out to this loop when there are no pending events.
+        // If we don't reset these, we may not re-enter ProcessNextEvent()
+        // until we have events to process, and it may seem like we have
+        // an event running for a very long time.
+        mThread->SetRunningEventDelay(TimeDuration(), TimeStamp());
+
         WaitForWorkerEvents();
       }
 
diff --git a/netwerk/base/nsSocketTransportService2.cpp b/netwerk/base/nsSocketTransportService2.cpp
index 6160cd0b7988..f2b155b22350 100644
--- a/netwerk/base/nsSocketTransportService2.cpp
+++ b/netwerk/base/nsSocketTransportService2.cpp
@@ -961,6 +961,11 @@ nsSocketTransportService::Run() {
       startOfNextIteration = TimeStamp::NowLoRes();
     }
     pollDuration = nullptr;
+    // We pop out to this loop when there are no pending events.
+    // If we don't reset these, we may not re-enter ProcessNextEvent()
+    // until we have events to process, and it may seem like we have
+    // an event running for a very long time.
+    mRawThread->SetRunningEventDelay(TimeDuration(), TimeStamp());
 
     do {
       if (Telemetry::CanRecordPrereleaseData()) {