Fix: even more resilience to detect slash commands

src/components/views/rooms/SendMessageComposer.js

@@ -182,7 +182,7 @@ export default class SendMessageComposer extends React.Component {
             // be extra resilient when somehow the AutocompleteWrapperModel or
             // CommandPartCreator fails to insert a command part, so we don't send
             // a command as a message
-            if (firstPart.type === "plain" && firstPart.text.startsWith("/")) {
+            if (firstPart.text.startsWith("/") && (firstPart.type === "plain" || firstPart.type === "pill-candidate")) {
                 return true;
             }
         }