Modem lost OFDMA Channel!

We had some pretty bad storms 2 days ago in the Maryland area. My Comcast network and Netgear CM3000 have fared fine. But today, I checked on a (Comcast) neighbor's modem stats (also a CM3000 modem), and I saw something strange - they have lost their OFDMA upstream channel! Their plan speeds are either 1GB/100M or 1.2GB/200M, something like that. Historically their modem power/SNR/error logs, etc. has been pretty clean.

I happened to have older house logs, on Mar 12 their modem reported:

Upstream OFDMA Channels

Channel LockedStatus ProfileID ChannelID Frequency Power

1 Locked 12 ,13 41 36200000 Hz 40.5 dBmV

2 Not Locked 0 0 0 Hz 0 dBmV

Yet this morning it shows as this:

Upstream OFDMA Channels

Channel LockedStatus ProfileID ChannelID Frequency Power

1 Not Locked 0 0 0 Hz 0 dBmV

2 Not Locked 0 0 0 Hz 0 dBmV

Our bad storms were Mar 16. How should I proceed as they have asked for my help - power cycle modem? Wait a few days for it to correct? call Comcast? Other? Is there a way I should try getting it re-provisioned?

PS - we are on different CMTS-MAC addresses, I assume different node/tap. Their log had a burst of T3 errors on Mar 17, no T4s, no modem restarts, etc. Normally their modem power levels/stats/errors are pretty good.