This just started to happen after the firmware upgrade
Any advice
Similar experience yesterday. I did the same thing and disabled the sensor. I know its a firmware related issue as I was able to connect to the Di2 sensor with an Edge 1000. No issues. There are no recent firmware updates for the 1000
I will put a support call into Garmin this week and post here what they tell me
This has to be a known problem as there are other post with the same issue associated with older firmware versions. Despite searching I haven't been able to find Garmin's solution
A support incident has been opened for this. Garmin is aware as they have received other inquiries. Agent confirmed that this is a "software" issue and that it is not only isolated to the Di2 sensor. Garmin will follow up when a fix is implemented. No timeline on that.
I've been riding with Edge 830 + Di2 for a year and a half, and no issues with EW-WU111 in the seat post. Some updates came through recently and the head unit started constantly notifying "Di2 Found" so I unpaired it. Hopefully, Garmin can get this firmware issue ironed out ASAP.