Whan you modify an activity from a Potential

Whan you modify an activity from a Potential

Hi guys,
this is the issue that I encuntered.
From inside a Potential I create a new activity uusing Log a call .
Then I choose an outbound Call type, Completed call in details, I put the description and I saved .
Then from the Potential details I edit ed the call. First issue is that marked as an inbound call even if I selected outbound when I created it.
Now, once I save my modifications the activity disappear from inside the Potential .
I can only see this activity in the general activities list and I don't have any tool to associate again this activity to the Potential .

Thanks for you help