Can you try and setup auto archiving? [piwik.org]
Piwik automatically archives data when you request it, but that is slow and _could_ be a responsible for what you get (although Piwik should never return empty data).
Please let us know if this continues to be a problem.
Piwik automatically archives data when you request it, but that is slow and _could_ be a responsible for what you get (although Piwik should never return empty data).
Please let us know if this continues to be a problem.