Is this something I can fix? No

Is this something that can be fixed? No

Is this a non-issue? Yes

The reason both drop out together... is that the the SRM reports BOTH power and cadence to the PC7. When you lose signal from the the SRM you lose both. When the signal comes back... you get both back.

Do you have the latest firmware? AFAIR there have been some enhancements in that area.

For PC7 or the powermeter itself?

The cacophony of radio signals all around is drowning out the receiver. Think of it as trying to see a candle light amongst 1000 search lights. Incredibly that's a good analogy to what radio receivers are built to do, but they can get overwhelmed by strong signals on an occasion.

PC7: "The new firmware improves the ability of the PowerControl7 to receive sensor data."
Hmm, it seems this is from 2014-02-17.