cors is ok, just seems one chrome extension was bothering it

account/src/index.ts

@@ -12,7 +12,7 @@ import dictionaryRouter from "./routers/dictionary-router";
 
 const sameOriginCorsOpts = {
   origin: inProd ? /\.lingdocs\.com$/ : "*",
-  methods: "GET,HEAD,PUT,PATCH,POST,DELETE,OPTIONS",
+  methods: "GET,HEAD,PUT,PATCH,POST,DELETE",
   credentials: true,
 };
 const app = express();

account/test.http

@@ -8,7 +8,7 @@ content-type: application/json
 
 ###
 
-PUT https://account.lingdocs.com/feedback HTTP/1.1
+OPTIONS https://account.lingdocs.com/feedback HTTP/1.1
 content-type: application/json
 
 {