GMS 2018.01

Hi.

Our GMS server is having fun it's talking to a 2018.01 and late 2014 post offices.

All day appointments sent from an iphone using the native iOS App appear in the senders Groupwise / Webmail calendars as two day appointments sometimes for that day and the day before sometimes for that day and the day after. They are correct in the recipients mailboxes and also look fine on the senders iphone

Anyone had a similar experience and solved it?