Clicking "Prepend the site domain" not saved

Hi,
I have installed latest Piwik version but I have an issue when cliking on “Prepend the site domain to the page title when tracking” in “Tracking code” section.

The selection is not saved. If I reload the page, checkbox remains unchecked.

When looking at network messages, when clicking on checkbox, I see 2 messages sent to the server, the first being cancelled.

In message FormData I see:

piwikUrl: my_piwik_url
groupPageTitlesByDomain:1
mergeSubdomains:0
mergeAliasUrls:0
customCampaignNameQueryParam:
customCampaignKeywordParam:
doNotTrack:0
disableCookies:0
token_auth: XXX

There is no error in my http error_log.

For info I am on CentOS 6/ php 5.4

Thanks

Hi there
Actually it is normal that it’s not saved. when you click the checkbox it updates the code box below. Then you can copy paste the code.

I created an issue so we improve the product to make this clear JavaScript Tracking Code: when a checkbox is clicked, make it clear the JS code was updated · Issue #7251 · matomo-org/piwik · GitHub