The drop down in the details panel for a t-map does not appear to take into account the length/size of the name of variable type and this can lead to the name being longer than the button used for the drop down.
Result: The name clips outside of the drop down button (image example provided)
Expected: The drop down button would expand to fit the full name of the variable type
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-59590 in the post.