Pending Group Calendar Entries disappear to early

I'm using the widget "User's Group Events" from BP Group Calendar v1.4.2 to display upcoming group events for logged in user's groups. The problem is that upcoming events disappear a few hours to early in the widget. A member who would like to check "last minute" when his/her e.g. meeting will take place, is eventually not aware… I double checked, the event is/was correctly registered and visible within the group – but not in the sidebar! For me that's a serious bug. Thanks for help, Hans