This is a prime example I came across that illustrates exactly why it is important to use the correct tool for the job.
These expensive heat shrink crimp terminals were destroyed by the installer by using a staking or dimple crimper as opposed to a tool specifically designed for heat shrink terminals like the CMI Controlled Cycle Heat Shrink Tool. These terminals were less than a week old and the split insulation was intentionally hidden from view, but I found them.