diff --git a/CHANGES b/CHANGES
index 7a6c458cae..a4915f76e3 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,6 @@
+6200.	[bug]		Fix nslookup erroneously reporting a timeout when the
+			input is delayed. [GL #4044]
+
 6198.	[func]		Remove the holes in the isc_result_t enum to compact
 			the isc_result tables. [GL #4149]
 
diff --git a/bin/tests/system/nslookup/tests.sh b/bin/tests/system/nslookup/tests.sh
index 1978eb40f3..abde65c98f 100644
--- a/bin/tests/system/nslookup/tests.sh
+++ b/bin/tests/system/nslookup/tests.sh
@@ -44,6 +44,22 @@ grep "1.2.3.4" nslookup.out${n} > /dev/null || ret=1
 if [ $ret != 0 ]; then echo_i "failed"; fi
 status=$((status+ret))
 
+# See [GL #4044]
+n=$((n+1))
+echo_i "Check A only lookup with a delayed stdin input ($n)"
+ret=0
+(sleep 6 && echo "server 10.53.0.1" && echo "a-only.example.net.") | $NSLOOKUP -port=${PORT} 2> nslookup.err${n} > nslookup.out${n} || ret=1
+lines=$(wc -l < nslookup.err${n})
+test $lines -eq 0 || ret=1
+lines=$(grep -c "Server:" nslookup.out${n})
+test $lines -eq 1 || ret=1
+lines=$(grep -c a-only.example.net nslookup.out${n})
+test $lines -eq 1 || ret=1
+grep "1.2.3.4" nslookup.out${n} > /dev/null || ret=1
+grep "timed out" nslookup.out${n} > /dev/null && ret=1
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status+ret))
+
 n=$((n+1))
 echo_i "Check AAAA only lookup ($n)"
 ret=0
diff --git a/lib/isc/netmgr/netmgr.c b/lib/isc/netmgr/netmgr.c
index 00a7945edb..b19d468820 100644
--- a/lib/isc/netmgr/netmgr.c
+++ b/lib/isc/netmgr/netmgr.c
@@ -847,6 +847,16 @@ isc__nm_async_task(isc__networker_t *worker, isc__netievent_t *ev0) {
 
 	result = isc_task_run(ievent->task);
 
+	/*
+	 * Tasks can block for a long time, especially when used by tools in
+	 * interactive mode. Update the event loop's time to avoid unexpected
+	 * errors when processing later events during the same callback.
+	 * For example, newly started timers can fire too early, because the
+	 * current time was stale. See the note about uv_update_time() in the
+	 * https://docs.libuv.org/en/v1.x/timer.html#c.uv_timer_start page.
+	 */
+	uv_update_time(&worker->loop);
+
 	switch (result) {
 	case ISC_R_QUOTA:
 		isc_task_ready(ievent->task);