Log full of this warning VisitorDetails.php

my matomo_logger_message is full of this.

WARNING HeatmapSessionRecording[2018-12-06 14:06:15 UTC] [55319] /var/www/html/piwik/plugins/HeatmapSessionRecording/VisitorDetails.php(60): Warning - array_key_exists() expects parameter 2 to be array, null given - Matomo 3.6.1 - Please report this message in the Matomo forums: https://forum.matomo.org (please do a search first as it might have been reported already)

any ideas?


This issue was resolved a few updates ago. Can you make sure you have the latest version, and let us know if you still have the issue.


matomo is 3.6.1
I did a restart of the environment on Friday.
now it seems to be all right