Page format goes wild, Apache error log has "Undefined property: aCase::$email1"

I’ve not been able to track down the exact set of circumstances to get this issue but when going for the detail of some module’s data back to the Home page via the Home option on one of the main drop down menus, the page format is messages up ans the following appears in the apcahe error.log;
Undefined property: aCase::$email1 in /var/www/html/crm/include/generic/SugarWidgets/SugarWidgetSubPanelTopComposeEmailButton.php on line 108

Please let me know of there are any particulars about my system that I ned to post here other than;
Ubuntu 16.04
Apache 2.4.18
PHP 7.0.30
SuiteCRM 7.10.6

Thanks, Richard

Nobody seen this happen? Just me?

Yes it’s definitely in the logs.

Me too at version 7.11.13, did someone detect the origin of the problem?