As can be seen in the screenshot attached, some of the “trial start”s are listed as “unknown” in the country breakdown. We didn’t have that issue before, suddenly it started on March 3rd. We didn’t had a new release or a change in the IAPs etc. 
The thing is, when a trial is converted to a subscription the country data is available again in the “Active Subscription” charts. How can I fix that?

I appreciate any help,

Thanks in advance