utm_* tags not showing up in UI

[beef3333]

I am trying to track some campaigns to a small site and am running plausible in K8s. Everything seems to be working great but when I click on links with tags setup like this, /demo?utm_source=newsletter&utm_medium=email&utm_campaign=test the data does not always show up in the Plausible UI sources area.

After hitting a URL with those params the page views will correctly go up, but not the source's data. To check I looked at the Clickhouse DB all the data appears to be in the events table correctly for each pageview.

This is a key part of moving over to plausible long term and I am curious if anyone else has seen this.

Edit

After looking some more it seems like the stats come from the sessions table, and that does not appear to be updating if I update the query params. Is this intended to not change for a given session?

[metmarkosaric]

The referral sources are counted only when they start a new session on your site. See https://plausible.io/docs/top-referrers

[beef3333]

Just to make sure I follow, that means that in the UI (even thought events track each page view correctly) if a user were to get several links with different utm params in it for say 2 emails, it would not count them in the UI stats since it would count as the same session?

[metmarkosaric]

Exactly. Only the first click would count in the referral sources.

[beef3333]

Are there docs on how long a session lasts and when a user will start a new one?

[metmarkosaric]

30 minutes