Hi.
I know it's a bit old this post and i guess you have probably solved it by now. But to mark an event with mulitple lines you need to use the Event marker option on the file logs. The default value for that option is ^ which match all new lines. If for example your event starts with [2020-06-09] you need to regex match that with something like this ^\[\d{4}-\d{2}-\d{2}\]. Then it should only be a new event when the regex pattern match a date.
Hope that helps if you hadn't solved it before.
Best regards
//Cederberg