I tried to upgrade to the latest Matomo 5RC a few times by running the update check and Matomo wouldn't suggest the latest Matomo 5 RC update is available.

I started debugging why that is and noticed we have a 2 second HTTP timeout in https://github.com/matomo-org/matomo/blob/5.0.0-rc2/core/UpdateCheck.php#L71

However, https://api.matomo.org/1.0/getLatestVersion/?piwik_version=5.0.0-rc1&php_version=8.1.14&mysql_version=8.0.26&release_channel=latest_5x_beta&url=http%3A%2F%2Fmyest.com%2F.%2Fconsole&trigger=&timezone=Europe%2FLondon took 4 seconds to execute.

5-10 minutes later the request took less than 2 seconds and only few hundred ms.

I'm not sure why the request took so long at times and if there has been a regression in performance and/or if it makes sense to increase the timeout so that when people do want to upgrade, it won't falsely say there's no update available