Update 15_metadata.md

_docs/55_events/15_metadata.md

@@ -9,6 +9,10 @@ last_modified_at: 2023-01-20
 To collect additional data on top of [our collected metrics](/metrics), you can append metadata. With this feature you can specify specific parameters and it will be included in our database with your datapoints (events or page views).
 
 <blockquote class="red" markdown="1">
+Currently, there is an issue with storing metadata. It does not always get saved. We are working on that issue, but it's an issue deep in our systems.
+</blockquote>
+
+<blockquote markdown="1">
 
 Do **not** include personal data in your metadata like email addresses, identifiers, or any other type of personal data. We don't allow it and your account might be suspended.