Scan performance

Hello,

with my nrf52dk board i had made some tests to check the scan performance.

1. Using nrf Sniffer - with Wireshark
2. nrf Mesh - LightSwitch Client (Mesh SDK v4.2.0)
3. nrf Mesh - LightSwitch Client (nRF Connect SDK v1.9.1)

My results were as following:

1. The nrf Sniffer software was able to detect 25.000 advertising packages (including CRC etc.)
2. LightSwitch Client (Mesh SDK v4.2.0) was able to detect only 11.000 adv. packages 
   1. used the stats struct in scanner.c
3. LightSwitch Client (nRF SDK v1.9.1) was able to detect only 4.000 adv. packages
   1. added a variable inside the scan callback and wrote it to the console every minute
   2. changed scanwindow and scaninterval to 2000 like it is in 2.

Does it indicate that project 2. and 3. are missing advertising packages?

Could you please help me?

Best regards

Andrej Robertus