I noticed a bug when going into ACP > Groups > Members (or any group for that fact) and clicking edit;
ErrorException: Argument 1 passed to IPS\membermap\extensions\core\ContentRouter\_MemberMarkers::__construct() must be an instance of IPS\Member, instance of IPS\Member\Group given, called in /home/xxxx/public_html/forum/system/Application/Application.php on line 756 and defined (4096)
#0 /home/xxxx/public_html/forum/applications/membermap/extensions/core/ContentRouter/MemberMarkers.php(38): IPS\IPS::errorHandler(4096, 'Argument 1 pass...', '/home/xxxx/p...', 38, Array)
#1 /home/xxxx/public_html/forum/system/Application/Application.php(756): IPS\membermap\extensions\core\ContentRouter\_MemberMarkers->__construct(Object(IPS\Member\Group))
#2 /home/xxxx/public_html/forum/system/Application/Application.php(303): IPS\_Application->extensions('core', 'ContentRouter', true, Object(IPS\Member\Group))
#3 /home/xxxx/public_html/forum/applications/core/extensions/core/GroupForm/Content.php(36): IPS\_Application::allExtensions('core', 'ContentRouter', Object(IPS\Member\Group))
#4 /home/xxxx/public_html/forum/applications/core/modules/admin/members/groups.php(189): IPS\core\extensions\core\GroupForm\_Content->process(Object(IPS\Helpers\Form), Object(IPS\Member\Group))
#5 /home/xxxx/public_html/forum/system/Dispatcher/Controller.php(86): IPS\core\modules\admin\members\_groups->form()
#6 [internal function]: IPS\Dispatcher\_Controller->execute()
#7 /home/xxxx/public_html/forum/init.php(448) : eval()'d code(14): call_user_func_array('parent::execute', Array)
#8 /home/xxxx/public_html/forum/applications/core/modules/admin/members/groups.php(35): IPS\Dispatcher\hook781->execute()
#9 /home/xxxx/public_html/forum/system/Dispatcher/Dispatcher.php(143): IPS\core\modules\admin\members\_groups->execute()
#10 /home/xxxx/public_html/forum/admin/index.php(14): IPS\_Dispatcher->run()
#11 {main}