diff --git a/tracker/tracker-axios/package.json b/tracker/tracker-axios/package.json
index 06d2b41a0..c92d75112 100644
--- a/tracker/tracker-axios/package.json
+++ b/tracker/tracker-axios/package.json
@@ -1,7 +1,7 @@
 {
   "name": "@openreplay/tracker-axios",
   "description": "Tracker plugin for axios requests recording",
-  "version": "3.4.2",
+  "version": "3.4.3",
   "keywords": [
     "axios",
     "logging",
diff --git a/tracker/tracker-axios/src/index.ts b/tracker/tracker-axios/src/index.ts
index f9d53e025..ff3b9a0bc 100644
--- a/tracker/tracker-axios/src/index.ts
+++ b/tracker/tracker-axios/src/index.ts
@@ -12,6 +12,7 @@ export interface Options {
   ignoreHeaders: Array<string> | boolean;
 }
 
+// TODO: test webpack 5 for axios imports
 
 function isAxiosResponse(r: any): r is AxiosResponse {
   return typeof r === "object" &&
@@ -40,6 +41,8 @@ export default function(opts: Partial<Options> = {}) {
       : () => ihOpt
 
     const sendFetchMessage = (res: AxiosResponse) => {
+      // ?? TODO: why config is undeined sometimes?
+      if (!isAxiosResponse(res)) { return }
     	// @ts-ignore
     	const startTime: number = res.config.__openreplayStartTs;
     	const duration = performance.now() - startTime;
@@ -107,9 +110,10 @@ export default function(opts: Partial<Options> = {}) {
       );
     }
 
-    // TODO: why app.safe doesn't work here?
     options.instance.interceptors.request.use(function (config) {
-    	if (options.sessionTokenHeader) {
+      if (typeof config !== "object") { return config } // ??
+
+      if (options.sessionTokenHeader) {
         const sessionToken = app.getSessionToken();
         if (sessionToken) {
           if (config.headers === undefined) {
@@ -152,7 +156,7 @@ export default function(opts: Partial<Options> = {}) {
 	  		app.send(getExceptionMessage(error, []));
 	  	}
 
-      // TODO: common case (selector)
+      // TODO: common case (selector option) for modified responses
       if (isAxiosResponse(error)) {
         sendFetchMessage(error)
       }