Same IP address duplicated on HTTP_X_FORWARDED_FOR

Since the 16th March, I’ve started to see a duplicated IP address coming on HTTP_X_FORWARDED_FOR like, or,

I perfectly know this is what the documentation says at about appending the IP address, but CF is the only proxy in front of our web servers and everything was working great up to the 16th.
Our servers are using mod_remoteip as documented here and we are retrieving the user IP address from HTTP_X_FORWARDED_FOR header.

Sound like a coincidence, but the problem started when I saw the new web interface.

Moreover, I do not understand how is possible to have the same IP “forwarded for” twice.

Anyone had the same problem?

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