"Undefined index: description" in actions

add a trigger in action conditions, save action. get trigger removed (in another tab). refresh the first page (where green "action updated" message is".
errors :

reset() expects parameter 1 to be array, null given [include/actions.inc.php:113]
Undefined index: description [include/actions.inc.php:119]

maybe also reproducible by passing a non-existent trigger as action condition over the api ?