I ran into this and ended up putting Kapton tape over pin 3.
Since the tape was wider than the pins I put a piece of tape over all the contacts and used an x-acto knife to cut out the tape covering the other pins.
Do not use electrical tape. The glue is very gummy and will ooze under the higher temperatures. When you withdraw the connector (or drive from the cage) the tape could stay behind and will probably leave a sticky mess in the connector.
Kapton doesn't have these problems. It will continue to hold under high temperatures and will release cleanly when you need it to.