diff --git a/src/PosthogAnalytics.ts b/src/PosthogAnalytics.ts
index 2932f137..4da55e39 100644
--- a/src/PosthogAnalytics.ts
+++ b/src/PosthogAnalytics.ts
@@ -113,7 +113,11 @@ export class PosthogAnalytics {
       project_api_key: Config.instance.config.posthog?.api_key,
       api_host: Config.instance.config.posthog?.api_host,
     };
-    if (posthogConfig.project_api_key && posthogConfig.api_host) {
+    if (
+      posthogConfig.project_api_key &&
+      posthogConfig.api_host &&
+      PosthogAnalytics.getPlatformProperties().matrixBackend === "jssdk"
+    ) {
       this.posthog.init(posthogConfig.project_api_key, {
         api_host: posthogConfig.api_host,
         autocapture: false,
diff --git a/src/PosthogEvents.ts b/src/PosthogEvents.ts
index 5dacac9d..4fb6181d 100644
--- a/src/PosthogEvents.ts
+++ b/src/PosthogEvents.ts
@@ -96,8 +96,7 @@ export class SignupTracker {
   track() {
     PosthogAnalytics.instance.trackEvent<Signup>({
       eventName: "Signup",
-      signupDuration:
-        new Date().getSeconds() - this.cache.signupStart.getSeconds(),
+      signupDuration: Date.now() - this.cache.signupStart.getTime(),
     });
     PosthogAnalytics.instance.setRegistrationType(RegistrationType.Registered);
   }