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Link layer notification confirmation on Wireshark

Hello,

I am working developing an application that sends data as notification to connected host at the data rate of 2KB/sec. The chip being used is NRF52832 with S132 soft-device.

Data is sent to host through notification every 20ms. The issue I am facing is of packet loss. At the end user application on the host side I see packets being dropped or lost. I believe there is a link layer confirmation that happens once the notification is sent. However I don't know how to find it in wireshark. I am attaching wireshark capture here for reference. 

dropppedPackets.pcapng

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