Hello Piwik folks.
tracking from mobile devices should work fine… Maybe you can see some warnings, or JS errors, or other messages in the browser console ?
If you cant see anything, then try to debug the tracking requests as explained in: Tracking HTTP API: API Reference - Matomo Analytics (formerly Piwik Analytics) - Developer Docs - v3
I found the problem – I was using a self-signed certificate for the piwik domain. After getting a valid certificate, everything works as expected. I was seeing results for myself, because I had approved the self-signed certificate on my machine. Using incognito mode revealed the network errors with the external piwik resources.