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nRF51822 sniffer Decryption incorrectly

We've been using the nRF51822 sniffer to listen to packets. One of our developers used to be able to use it decrypting packets without a problem (He uses 32-bit system, firmware version special built provided by you guys - 096_alpha_739_766fw), but lately he starts to have the issue where the "Encrypted packet decrypted incorrectly (bad MIC)" mixed into the correctly decrypted packets before and after. Failure rate is very high.

I'm using a 64-bit system, firmware 1.0.1_1111, downloaded from your website. I have the same issue using decryption, one file I recorded is decryption correct at the beginning, and shortly after changed to decrypted incorrectly (bad MIC). I tried couple more times, and now couldn't even get one packet correct... I tried both versions of firmwares, on this 64-bit and another 32-bit PC, none would work. Different dongles, none worked.

Please advice on what we can try. Or whether another firmware version with issue fixed should be applied?

Thanks!! Dandan

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