diff --git a/webui-src/app/chat/chat_state.js b/webui-src/app/chat/chat_state.js
index ee6208a..54dd2e0 100644
--- a/webui-src/app/chat/chat_state.js
+++ b/webui-src/app/chat/chat_state.js
@@ -436,8 +436,33 @@ const ChatRoomsModel = {
       '/rsChats/denyLobbyInvite',
       { id: { xstr64: lobbyId } },
       (data, success) => {
-        if (!success || !data || !data.retval) {
-          this.joinError = 'RetroShare could not decline this invitation.';
+        if (!success) {
+          //  No answer at all: the core is unreachable or the endpoint is not
+          //  in this build. Nothing was decided, so nothing is dropped here.
+          this.joinError = 'No answer from RetroShare, the invitation was left alone.';
+          m.redraw();
+          return;
+        }
+        if (!data || !data.retval) {
+          //  denyLobbyInvite() only returns false for one reason: the id is not
+          //  in the core's invite queue (DistributedChatService, "lobby invite
+          //  not in cache"). The queue lives in memory only, so a core restart
+          //  empties it while this list still shows what it held before.
+          //
+          //  Either way the invitation is gone as far as the core is concerned,
+          //  and keeping it here would leave the Chat badge lit over something
+          //  that can never be accepted nor refused. Drop it and re-read the
+          //  queue, so the list ends up saying what the core says.
+          this.invitationIds.delete(lobbyId);
+          this.allRooms = this.allRooms.filter(
+            (room) => rs.idToHex(room.lobby_id) !== lobbyId
+          );
+          if (ChatHubState.selectedRoomId === lobbyId) {
+            ChatHubState.selectedRoomId = null;
+            ChatHubState.mobilePane = 'list';
+          }
+          this.joinError = 'RetroShare no longer had this invitation; it has been removed from the list.';
+          this.loadPendingInvitations();
           m.redraw();
           return;
         }
diff --git a/webui-src/app/main.js b/webui-src/app/main.js
index d964ebc..ada3765 100644
--- a/webui-src/app/main.js
+++ b/webui-src/app/main.js
@@ -137,7 +137,7 @@ const navbar = () => {
                       ? 'Connected to RetroShare Core'
                       : 'Connection Lost',
                   }),
-                  m('span.webui-version', { style: { fontSize: '0.7em' } }, 'v158'),
+                  m('span.webui-version', { style: { fontSize: '0.7em' } }, 'v159'),
                   m('i.fas.fa-sync-alt.refresh-icon', {
                     style: { cursor: 'pointer', fontSize: '0.8em' },
                     onclick: () => window.location.reload(true),
@@ -260,7 +260,7 @@ const MobileStatus = () => {
               m('small', statusbar.formatBytes(state.totalOut)),
             ]),
           ]),
-          m('.mobile-status-sheet__version', 'WebUI v158'),
+          m('.mobile-status-sheet__version', 'WebUI v159'),
         ])),
       ];
     },