ref(sourcemaps): Add faulty community-maintained packages to troubleshooting doc (#12915)

Author: doronpr

platform-includes/sourcemaps/troubleshooting/javascript.mdx

@@ -190,3 +190,11 @@ The Sentry Node.js SDK generally works well with the [source-map-support](https:
 
 If you are uploading source maps to Sentry or if you are using a Sentry SDK in the browser, your code cannot use the `source-map-support` package.
 `source-map-support` overwrites the captured stack trace in a way that prevents our source map processors from correctly parsing it.
+
+### Third-Party Integrations
+
+In rare cases, faulty or outdated third-party integrations may modify the error sent to Sentry, causing essential information to be lost and preventing Sentry from displaying the source map. If you're using a third party integration or other community-maintained packages, try to temporarily disable them to rule out this possibility.
+
+We will collect known instances of conflicting third-party packages here:
+
+- `posthog-js` versions from `1.207.4` to `1.229.0` (fixed in `posthog-js` version `1.229.1`)