LG G7 ThinQ - What does a flashing red LED notification light means?

[Android Central Question]

I know the non-flashing red LED light means the battery is charging, but what does a flashing red light mean? My husband called several and I didn't hear the phone (ringer up and battery charged). I noticed a red flashing light. Did I lose service/connection maybe? A UK LG forum shows flashing red as Bluetooth disconnected, but I don't use Bluetooth. Thanks in advance!