I’ve been having the same issue, but was able to get it fixed. Follow these steps:
Go to Settings>sensors>FP-Jabra Elite Act. Remove it. It should now only show Jabra Active Elite —no FP before it…
You have to avoid connecting the Jabras as a sensor. Say no when it asks.
Try this. Go to sensors & accessories on the watch,there're FP-Jabra Elite Act and Jabra Elite Act. Remove FP-Jabra Elite Act one.
Hard to say if you're sure you are not doing anything else differently. You can try resetting the earphones to see if that helps.
I have the same problem with my forerunner 945.
As soon as i go to the activity screen all connections to my headphones will be killed, even between headphones and smartphone.
I dont think its related to gps, because this also occurs before i select an activity or when i select indoor swim (no gps).