Could unbind after deleting templateinstance with servicebinding existing. Can't reproduce this bug in ocp v3.7.29 with service-catalog(image id ce5cecc95a66) and ose(image id 67270b3564b7) images
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHBA-2018:0636