When looking at task run result history I noticed that a failed recipe was listed.
but when I click on the recipe it spins for a while then tells me it was deleted.

For example go here:
https://beaker.engineering.redhat.com/tasks/1265
In the Executed Tasks section only set Result to 'Failed'. Then submit query.

At this point in time it only comes back with two results for me:
T:1559234 - https://beaker.engineering.redhat.com/recipes/142789#task1559234
and 
T:237540 - https://beaker.engineering.redhat.com/recipes/19302#task237540

When I click on the T:1559234 it works and brings me to the recipe. When I click on T:237540 it spins for a while then gives me all of the recipes and says "Invalid R:19302, has been deleted"

It looks like when something is deleted all associated data is not deleted.