Why does MT4 automatically delete your acciount history randomly?

 

MT4 randomly deleted all of my account history. Why? I did nothing to this end at all.

How do I prevent this? Any hidden settings/tricks?

 

I am not aware of account history being randomly deleted.

Right click in the history window and click on "All History"

 
It could be that the history hasn't been totally loaded from the broker after a new/re- connect...
 
ok thx