An issue has been discovered with the latest batch of CANcoders - a small number of units have a bottom housing half that has a tab which is too long. If you have received a unit with this issue, please see below for the recommended fix.
An example of the incorrect and correct housing:
FIX: The incorrect housing tab can be corrected by using diagonal cutters to trim the tab length.
This information has also been documented in Section 6.1 of the CANcoder User's Guide.