An Awkward Silence

Why the longer-than-normal pause in comms after Apollo 13's reentry?  Here, watch.
https://www.bbc.com/news/av/science-environment-52281273/apollo-13-the-silence-in-the-blackout-from-those-who-were-there
In fact, it was a shallower than normal reentry, just took a minute longer.  A nerve-wracking minute, to be sure.