wizard: link to wizard pages doesn't work when opened for the first time

[Marigold]

Owidbot posts a link to chart-diff page to every PR such as http://staging-site-ntd-funding/etl/wizard/Chart%20Diff. However, when I click on it, I see an error

Page not found
You have requested page /Chart Diff, but no corresponding file was found in the app's pages/ directory. Running the app's main page.

Then I have to manually click on it in wizard. Interesting, after opening the page from Wizard, the link then works (I guess streamlit saves some info about the page internally?).

It's not a big deal, but I wonder if there's an easy solution and whether it bothers someone else too.