Double advertisement

Why are there two advertisement packets sent per advertisement? My beacons are currently configured with Estimote advertisement packet and I always get two triggers within a millisecond per advertisement packet. (This also happens with Eddystone)
I can confirm this with the sniffer that I have. For a screenshot, see this link: Sniffer screenshot

Hmm, is this only one specific packet filtered out? Our firmware 4.x can broadcast multiple packets at the same time, so maybe what you’re seeing is two different packets broadcast with the same adv interval? Also, firmware 4.x introduces a dedicated “connectable/configuration” packet used for connecting to the beacon, and it’s always on, so maybe that’s the “duplicate” you’re seeing?