Email clicks not tracked. Can someone point me to how debug it?

Your software
My Mautic version is: 3.1.0
My PHP version is: 7.2.31

Your problem
My problem is: email clicks are not tracked
When I click in an email, it redirects correctly, but I don’t find ever a click.
Email reads are correctly reported

These errors are showing in the log: no errors in log

Steps I have tried to fix the problem:
I have upgraded to 3.1.0
I have reinstalled it from scratch
I have tried to start with index_dev.php but no luck

what are you using to send mails ?

We are using our own smtp server.
We have solved the issue. I am not sure 100% what was the problem, but I found in another post that it was connected to proxied ips.
the post is
We checked, and actually we had a NAT active in our firewall, that prevented the client ip to be sent to mautic.
deleting the NAT solved immediately the issue.