diff --git a/flexqos.asp b/flexqos.asp
index 5f8e28d..cf0d84e 100644
--- a/flexqos.asp
+++ b/flexqos.asp
@@ -1185,6 +1185,7 @@ function get_data() {
 		success: function(response) {
 			redraw();
 			draw_conntrack_table();
+			check_bandwidth_flow();
 			timedEvent = setTimeout("get_data();", refreshRate * 1000);
 		}
 	});
@@ -1297,6 +1298,56 @@ function initialize_charts() {
 	line_obj_ul=line_obj;		// actually draws the chart on the page
 } // initialize_charts
 
+function getFwBase () {
+    /*  "3.0.0.6"  →  3006  */
+    const ver = document.getElementById('firmver')?.value || '';
+    return parseInt(ver.replace(/\./g, ''), 10);     // NaN if blank
+}
+
+window.addEventListener('DOMContentLoaded', () => {
+    const fwBase = getFwBase();
+
+    const noflowMsg = (fwBase === 3006)
+        ? 'Adaptive QoS is not functioning correctly on '
+          + 'BE-series routers due to a known ASUS / Trend Micro issue. '
+          + 'Once ASUS resolves this, FlexQoS should work as expected.'
+        : 'Adaptive QoS appears to be malfunctioning. '
+          + 'FlexQoS cannot apply its rules while the underlying QoS system is malfunctioning.';
+
+    const span = document.getElementById('noflow_msg');
+    if (span) span.innerHTML = noflowMsg;
+});
+
+/* consider anything below this many *kilobits* per second “idle” */
+const NOFLOW_CUTOFF_KBPS = 1;      // feel free to raise/lower
+const NOFLOW_THRESHOLD   = 5;     // 5 × 3s refresh about 15 seconds
+
+let noFlowCounter = 0;
+
+function kbpsFromRateString(str) {
+    if (!str) return 0;
+    if (str.includes("Mbit"))  return parseFloat(str) * 1000;
+    if (str.includes("Kbit"))  return parseFloat(str);
+    return parseFloat(str) / 1000;
+}
+
+function check_bandwidth_flow () {
+    let dlRate = 0, ulRate = 0;
+
+    for (const e of tcdata_lan_array) dlRate += kbpsFromRateString(e[2]);
+    for (const e of tcdata_wan_array) ulRate += kbpsFromRateString(e[2]);
+
+    if (dlRate < NOFLOW_CUTOFF_KBPS && ulRate < NOFLOW_CUTOFF_KBPS) {
+        noFlowCounter++;
+    } else {
+        noFlowCounter = 0;
+    }
+
+    const warn = document.getElementById('noflow_notice');
+    warn.style.display = (noFlowCounter >= NOFLOW_THRESHOLD) ? 'block'
+                                                             : 'none';
+}
+
 function change_chart_scale(input) {
 	var chart_scale = cookie.get('flexqos_rate_graph_scale');
 	if ( input == null ) {
@@ -2743,7 +2794,7 @@ function DelCookie(cookiename){
 <iframe name="hidden_frame" id="hidden_frame" width="0" height="0" frameborder="0"></iframe>
 <form method="post" name="form" action="/start_apply.htm" target="hidden_frame">
 <input type="hidden" name="preferred_lang" id="preferred_lang" value="<% nvram_get(" preferred_lang "); %>">
-<input type="hidden" name="firmver" value="<% nvram_get(" firmver "); %>">
+<input type="hidden" name="firmver" id="firmver" value="<% nvram_get(" firmver "); %>">
 <input type="hidden" name="current_page" value="">
 <input type="hidden" name="next_page" value="">
 <input type="hidden" name="action_mode" value="apply">
@@ -2925,6 +2976,11 @@ function DelCookie(cookiename){
 </table>
 <br>
 <div id="no_aqos_notice" style="display:none;font-size:125%;color:#FFCC00;">Note: Adaptive QoS is not enabled.</div>
+<div id="noflow_notice"
+     style="display:none;font-size:125%;color:#FFCC00;">
+    No bandwidth flow detected.
+    <span id="noflow_msg"></span>
+</div>
 <table>
 <tr id="dl_tr">
 <td style="padding-right:10px;font-size:125%;color:#FFCC00;">
diff --git a/flexqos.sh b/flexqos.sh
index 7db75df..d1b77a0 100644
--- a/flexqos.sh
+++ b/flexqos.sh
@@ -42,6 +42,12 @@ readonly ADDON_DIR="/jffs/addons/${SCRIPTNAME}"
 readonly WEBUIPATH="${ADDON_DIR}/${SCRIPTNAME}.asp"
 readonly SCRIPTPATH="${ADDON_DIR}/${SCRIPTNAME}.sh"
 readonly LOCKFILE="/tmp/addonwebui.lock"
+# shellcheck disable=SC2155
+readonly fwInstalledBaseVers="$(nvram get firmver | sed 's/\.//g')"
+# shellcheck disable=SC2155
+readonly fwInstalledBuildVers="$(nvram get buildno)"
+# shellcheck disable=SC2155
+readonly fwInstalledExtendNum="$(nvram get extendno)"
 IPv6_enabled="$(nvram get ipv6_service)"
 
 # Update version number in custom_settings.txt for reading in WebUI
@@ -569,7 +575,7 @@ debug() {
 	scriptinfo
 	printf "Debug date      : %s\n" "$(date +'%Y-%m-%d %H:%M:%S%z')"
 	printf "Router Model    : %s\n" "${RMODEL}"
-	printf "Firmware Ver    : %s_%s\n" "$(nvram get buildno)" "$(nvram get extendno)"
+	printf "Firmware Ver    : %s_%s\n" "$fwInstalledBuildVers" "$fwInstalledExtendNum"
 	printf "DPI/Sig Ver     : %s / %s\n" "$(nvram get bwdpi_dpi_ver)" "$(nvram get bwdpi_sig_ver)"
 	get_config
 	set_tc_variables
@@ -1116,6 +1122,20 @@ menu() {
 	clear
 	sed -n '2,10p' "${0}"		# display banner
 	scriptinfo
+	if [ -f "/tmp/${SCRIPTNAME}_qos_failed" ]; then
+		if [ "$fwInstalledBaseVers" -eq 3006 ]
+		then
+			Yellow "Adaptive QoS is not functioning correctly on BE series routers"
+			Yellow "due to a known Asus/Trend Micro issue. Once Asus resolves this,"
+			Yellow "FlexQoS should work as expected."
+			printf "\n"
+		else
+			Yellow "Adaptive QoS appears to be malfunctioning."
+			Yellow "FlexQoS cannot apply its rules while the underlying QoS issue persists."
+			Yellow "Please investigate your router’s QoS settings before relying on FlexQoS."
+			printf "\n"
+		fi
+	fi
 	printf "  (1) about        explain functionality\n"
 	printf "  (2) update       check for updates\n"
 	printf "  (3) debug        traffic control parameters\n"
@@ -1717,11 +1737,13 @@ startup() {
 				logmsg "TC Modification Delay reached maximum 180 seconds again. Canceling startup!"
 				rm "/tmp/${SCRIPTNAME}_restartonce" 2>/dev/null
 			fi
+			touch "/tmp/${SCRIPTNAME}_qos_failed"
 			return 1
 		else
 			sleepdelay=$((sleepdelay+10))
 		fi
 	done
+	rm -f "/tmp/${SCRIPTNAME}_qos_failed"
 	[ "${sleepdelay}" -gt "0" ] && logmsg "TC Modification delayed for ${sleepdelay} seconds"
 	rm "/tmp/${SCRIPTNAME}_restartonce" 2>/dev/null