diff --git a/src/matrix/calls/group/GroupCall.ts b/src/matrix/calls/group/GroupCall.ts
index 0b8c7db5..6407584a 100644
--- a/src/matrix/calls/group/GroupCall.ts
+++ b/src/matrix/calls/group/GroupCall.ts
@@ -140,7 +140,7 @@ export class GroupCall extends EventEmitter<{change: never}> {
     get members(): BaseObservableMap<string, Member> { return this._members; }
 
     get isTerminated(): boolean {
-        return this.callContent?.["m.terminated"] === true;
+        return !!this.callContent?.["m.terminated"];
     }
 
     get isRinging(): boolean {
@@ -286,7 +286,7 @@ export class GroupCall extends EventEmitter<{change: never}> {
                     const request = this.options.hsApi.sendState(this.roomId, EventType.GroupCallMember, this.options.ownUserId, memberContent, {log});
                     await request.response();
                     // our own user isn't included in members, so not in the count
-                    if (this.intent === CallIntent.Ring && this._members.size === 0) {
+                    if ((this.intent === CallIntent.Ring || this.intent === CallIntent.Prompt) && this._members.size === 0) {
                         await this.terminate(log);
                     }
                 } else {
diff --git a/src/platform/web/ui/css/themes/element/call.css b/src/platform/web/ui/css/themes/element/call.css
index c0f1550e..3efe3c56 100644
--- a/src/platform/web/ui/css/themes/element/call.css
+++ b/src/platform/web/ui/css/themes/element/call.css
@@ -25,11 +25,13 @@ limitations under the License.
 }
 
 .CallView_error {
-    color: red;
-    font-weight: bold;
     align-self: start;
     justify-self: center;
     margin: 16px;
+    /** Chrome (v100) requires this to make the buttons clickable
+     * where they overlap with the video element, even though
+     * the buttons come later in the DOM. */
+    z-index: 1;
 }
 
 .CallView_members {