Sharepoint all day event issue

[sjpf]

I have a cover request calendar in Sharepoint in Office 365 then a workflow which emails the cover supervisor. When someone marks their request as an all-day event there seems to have been an update which has changed the times of these events.

 

E.g. If I add an event for today as an all-day event, the start time is 30/04/2018 01:00:00 and the end time is 01/05/2018 00:59:00. It used to be that the end time was same date then a time of 23:59:59

 

Is there a way to change this?