I understand you, but the problem is that that disappearing and appearing is currently without solution because of technical issues in it.
Of course we would like to have it without this, but so far we are unable to do anything about it 
Jan
It’s a pitty! Nothing happend in this case. You can not work with this calender if all items are disappear/reappear. If there is no aim to work on this issue, I delete and forget emClient. It is not a feature, it is only embarrassing, if I have to explain my customor, I have to wait on refreshing of my calender.
Markus