was this order deleted and how?

 

Hi all, in trades history I see a buy stop order that was not deleted from any expert.

From picture 1 I see the last expert action was BUY opening without error.

From picture 2 I see the Comment cell for this pending order is not "cancelled" but the order comment I wrote in the expert.

How can I find the reason for this order deleting?

Thank you!

Files:
1.png  9 kb
2.png  15 kb