Touching a collection on the left hand side, wipes out your work in aggregations with no warning When using aggregations and you are busy with your pipeline(s) If you left click on any of the collections on the left panel,  It wipes out your work on the aggregations (no warnings at all) [Yet when we paste in an exported version of the pipeline it gives a warning] This makes it hard to teach people how to use aggregations, as they have to treat the left hand panel like a land mine (and all they wanted to do was to look up the name for the field) Proposed fixes: give a warning you are about to erase your work - this would be bad for new user journey, they wouldn't know why the warning was there don't erase and just open in a new tab - this would create more tabs open